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Toradex Verdin, Manual

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Verdin Carrier Board Design Guide 

Preliminary 

– Subject to Change 

 

 

 

Toradex AG  l  Ebenaustrasse 10  l  6048 Horw  l  Switzerland  l  +41 41 500 48 00  l  

www.toradex.com 

 l  

[email protected] 

Page | 43 

2.7.1 

MIPI CSI-2 Signals 

Verdin 
Pin 

Verdin 
Signal Name 

I/O 

Type 

Power 
Rail 

Description 

111 

CSI_1_CLK_P 

I 

D-PHY 

 

MIPI CSI-2 differential clock positive 

113 

CSI_1_CLK_N 

I 

D-PHY 

 

MIPI CSI-2 differential clock negative 

123 

CSI_1_D0_P 

I/O 

D-PHY 

 

MIPI CSI-2 differential data lane 0, positive 

125 

CSI_1_D0_N 

I/O 

D-PHY 

 

MIPI CSI-2 differential data lane 0, negative 

117 

CSI_1_D1_P 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 1, positive 

119 

CSI_1_D1_N 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 1, negative 

105 

CSI_1_D2_P 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 2, positive 

107 

CSI_1_D2_N 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 2, negative 

99 

CSI_1_D3_P 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 3, positive 

101 

CSI_1_D3_N 

I 

D-PHY 

 

MIPI CSI-2 differential data lane 3, negative 

95 

I2C_4_CSI_SCL 

O 

OD 

1.8V 

I2C interface, intended to be used for controlling the camera 

93 

I2C_4_CSI_SDA 

I/O 

OD 

1.8V 

91 

CSI_1_MCLK 

O 

CMOS 

1.8V 

Master clock output for the camera. 

216 

GPIO_5_CSI 

I/O 

CMOS  

1.8V 

Reserved GPIO for MIPI CSI interface 

218 

GPIO_6_CSI 

I/O 

CMOS 

1.8V 

Reserved GPIO for MIPI CSI interface 

220 

GPIO_7_CSI 

I/O 

CMOS 

1.8V 

Reserved GPIO for MIPI CSI interface 

222 

GPIO_8_CSI 

I/O 

CMOS 

1.8V 

Reserved GPIO for MIPI CSI interface 

Table 18: MIPI CSI-2 signals 

 

2.7.2 

Reference Schematics 

The master clock output on the module edge connector pin 91 can be used for reducing the BOM 

cost. However, for longer camera cables or trace length on the carrier board, the master clock 

signal can become a source for EMI issues. Check also whether the selected Verdin module can 

provide the correct frequency for the camera. Alternatively, an external oscillator or crystal can be 

used. It is recommended to put this oscillator as close as possible to the camera.  

 

The ESD protection didoes and the common mode chokes are optional. The protection diodes are 

only required if the cables are accessible and/or the display does not have enough protection. The 

chokes can reduce EMI if the LVDS cables are longer. 

 

Figure 36: MIPI CSI-2 reference schematic 

 

CSI_1_MCLK

91

I2C_4_CSI_SDA

93

I2C_4_CSI_SCL

95

CSI_1_D3_P

99

CSI_1_D3_N

101

CSI_1_D2_P 105

CSI_1_D2_N

107

CSI_1_CLK_P

111

CSI_1_CLK_N

113

CSI_1_D1_P

117

CSI_1_D1_N

119

CSI_1_D0_P

123

CSI_1_D0_N

125

X1E

2309409 -2

CSI_1_D0_N

CSI_1_D0_P

CSI_1_D1_N
CSI_1_D1_P

CSI_1_CLK_N

CSI_1_CLK_P

CSI_1_D2_N

CSI_1_D2_P

CSI_1_D3_N
CSI_1_D3_P

GND

GND

100nF

16V

C229

GND

+V1.8_SW

100nF

16V

C230

GND

FXMA2102L8X

GND

4

VCCA

1

A0

2

OE

5

A1

3

B1

6

B0

7

VCCB

8

IC35

GND

GND

GND

GND

+V5_SW

CSI_1_D0_N

CSI_1_D0_P

CSI_1_D1_N

CSI_1_D1_P

CSI_1_CLK_N

CSI_1_CLK_P

CSI_1_D2_N

CSI_1_D2_P

CSI_1_D3_N

CSI_1_D3_P

100nF
16V

C234

100nF

16V

C233

+V5_SW +V3.3_SW

GND

+V3.3_SW

+V3.3_SW

+V3.3_SW

22R

RA29D

+V1.8_SW

+V1.8_SW

0R

R173

+V1.8_SW

I2C_4_OE

SN74AVC4T774RSVR

VCCA

14

OE

7

VCCB

13

A4

4

A1

1

A2

2

A3

3

GND

8

B3

10

B2

11

B1

12

B4

9

DIR1

15

DIR2

16

DIR3

5

DIR4

6

IC46

100nF

16V

C231

BAT54XV2T5G

D14

100nF

16V

C232

+V3.3_SW

+V1.8_SW

+V1.8_SW

+V1.8_SW

+V1.8_SW

GND

GND

GND

GND

GND

GND

GND

R279

10K

R280

10K

R284
10K

R176
100K

R339
100K

R340
100K

R338
100K

R170
1.8K

R171
1.8K

0

DIRx

Direction

A <= B

1

A => B

1
2
3

4

5
6
7
8
9

10

11
12
13

14

15

16

17
18
19

20

21
22
23

24

FH12-24S-0.5SV(55)

X47

CSI_1_MCLK

I2C_4_CSI_SCL

CSI_1_MCLK

I2C_4_CSI_CON_SDA

I2C_4_CSI_CON_SCL

CAM_1_CON_PWRCTRL

CAM_1_CON_PWRDWN

CAM_1_CON_RST

CAM_1_CON_IC_DETECT

CAM_1_CON_RST

12R@100MHz

1
2

3

4

L42

12R@100MHz

1
2

3

4

L43

12R@100MHz

1
2

3

4

L44

12R@100MHz

1
2

3

4

L45

12R@100MHz

1
2

3

4

L46

CSI_1_D0_CON_N

CSI_1_D0_CON_P

CSI_1_D1_CON_N
CSI_1_D1_CON_P

CSI_1_CLK_CON_P

CSI_1_D2_CON_N

CSI_1_D2_CON_P

CSI_1_D3_CON_N
CSI_1_D3_CON_P

+V3.3_SW

D3V3F4U10LP-7

8

3

1

2

4

5

D38

CSI_1_CLK_CON_N

D3V3F4U10LP- 7

8

3

1

2

4

5

D37

GND

GND

D3V3F4U10LP-7

8

3

1

2

4

5

D41

D3V3F4U10LP- 7

8

3

1

2

4

5

D40

GND

GND

D3V3F4U10LP-7

8

3

1

2

4

5

D39

GND

GND

GPIO_1

206

GPIO_2

208

GPIO_3

210

GPIO_4

212

PWR_1V8_MOCI

214

GPIO_5

216

GPIO_6

218

GPIO_7

220

GPIO_8

222

X1U

2309409 -2

I2C_4_CSI_SDA

CSI_1[0..9]

GND

GND

10uF

6.3V

C235

Summary of Contents for Verdin

Page 1: ...Verdin Computer Module Carrier Board Design Guide...

Page 2: ...se Preliminary Version October 16 2020 V0 91 Correct position of standoff holes in carrier board land pattern drawing Figure 92 Remove additional notches from the drawings of the module October 28 202...

Page 3: ...ent Ethernet Port 21 2 3 2 Reduced Gigabit Media Independent Interface Ethernet Port 24 2 4 USB 25 2 4 1 USB Signals 26 2 4 2 Reference Schematics 27 2 4 3 Unused USB Signal Termination 32 2 5 HDMI DV...

Page 4: ...put Signal Termination 55 2 18 GPIO 55 2 18 1 GPIO Signals 55 2 18 2 Unused GPIO Termination 56 2 19 JTAG interface 56 2 19 1 JTAG Signals 56 2 19 2 Reference Schematics 56 2 19 3 Unused JTAG Signal T...

Page 5: ...sues 83 3 5 5 Backfeeding Prevention 86 4 Mechanical and Thermal Consideration 95 4 1 Module Connector and Stacking Height 95 4 2 Fixation of the Module 96 4 3 Thermal Solution 96 4 4 Module Dimension...

Page 6: ...additional information on the routing of these interfaces 1 2 Additional Documents 1 2 1 Layout Design Guide This document contains layout requirement specifications for high speed signals and helps t...

Page 7: ...izes CEC Consumer Electronic Control HDMI feature that allows to control CEC compatible devices CPU Central Processor Unit CSI Camera Serial Interface DAC Digital to Analog Converter DDC Display Data...

Page 8: ...ernet PHY and cable connector MDIO Management Data Input Output an interface that is used for controlling the Ethernet PHY The bus consists of the MDC clock and the MDIO bidirectional data signal MDIX...

Page 9: ...tion card for GSM phones SMBus System Management Bus SMB two wire bus based on the I2 C specifications used specially in x86 design for system management SoC System on a Chip IC which integrates the m...

Page 10: ...nterfaces and some examples of Module specific interfaces 1x Gigabit Ethernet 1x RGMII 1x LVDS 1x USB 2 0 OTG 1x USB 2 0 Host 1x I2C 1x SPI 3x UART RX TX only 1x PWM 10x GPIO 1x SDIO 1x USB SuperSpeed...

Page 11: ...rier board combination may disable any all functionalities or even possibly damage the SoM and or the carrier board Using or relying on functionalities provided on Module specific pins or interfaces i...

Page 12: ...s during the design of Verdin SoMs these instances are prioritized according to the availability of the interface they belong to For example there are up to four I2 C instances in the Verdin specifica...

Page 13: ...ional PCI Express lanes It should be noted that Module specific interfaces will be kept common across modules that share such interfaces whenever possible For example if both module A and module B hav...

Page 14: ...zerland l 41 41 500 48 00 l www toradex com l info toradex com Page 14 Figure 2 Pin numbering schema on the bottom side of the module bottom view Figure 3 Pin numbering schema on the module connector...

Page 15: ...ces as Module specific interfaces Please consult the datasheets of such modules to determine if lane reversal is applicable and supported 2 2 2 Reference Schematics The PCIe schematic differs dependin...

Page 16: ...uch as Ethernet cards can use this signal to wake up the module from the suspend state The WAKE signal of the PCIe card slot is an open drain type Therefore no level shifter is required if the signal...

Page 17: ...erfaces the PCIe and USB As most of the Mini PCIe Cards use only one of its interfaces for an embedded carrier board which is developed for a restricted set of compatible cards it might be enough to i...

Page 18: ...E signal of the Mini PCIe Cards slot is an open drain type Therefore no level shifter is required if the signal is pulled up to 1 8V on the carrier board and not to 3 3V The R UIM interface of the Min...

Page 19: ...R3 I2C1_SDA I2C1_SCL GND PCIE1_WDISABLE V3 3_PCIE V1 5 LED1 LED2 LED3 150R R6 150R R7 150R R8 V3 3_SW PCIE1_WWLAN PCIE1_WLAN PCIE1_WPAN USBH_D_P USBH_D_N USBH 0 1 V3 3_SW V3 3_SW V3 3_SW PCIE1_RX_N P...

Page 20: ...ET_MOCI WAKE1_MICO I210 PE_RX_P 24 PE_CLK_P 26 PE_CLK_N 25 JTAG_TCK 19 JTAG_TDO 4 JTAG_TMS 18 JTAG_TDI 29 SMB_DATA 36 SMB_CLK 34 PE_TX_P 21 PE_TX_N 20 SDP0 63 XTAL_1 46 MDI_0_P 58 PE_RX_N 23 PE_RST 17...

Page 21: ...Reserved interface The RGMII requires a PHY to be placed on the carrier board and allows using multiple types of media for the physical link layer 2 3 1 Media Dependent Ethernet Port The Verdin featur...

Page 22: ...he magnetics Do not connect the center taps together The Ethernet connector with integrated magnetics provides a certain amount of protection against ESD If a higher level is required optional ESD pro...

Page 23: ...m Verdin Module Magnetics Ethernet Jack RJ 45 LINK LED ACT LED 2mm 100nF 16V C6 100nF 16V C7 100nF 16V C8 150R R6 150R R5 ETH1_MDI0_N ETH1_MDI1_P ETH1_MDI1_N ETH1_MDI2_P ETH1_MDI2_N ETH1_MDI3_P ETH1_M...

Page 24: ...Ethernet PHY In these cases special care must be taken that the address of the carrier board PHY does not conflict with the on module PHY address 2 3 2 1 RGMII Signals Verdin Pin Verdin Signal Name I...

Page 25: ..._2_MDI3_N ETH_2_MDI3_P ETH_2_ACT ETH_2_LINK BAT54XV2T5G D17 BAT54XV2T5G D18 AVDDH 1 AVDDL 4 AVDDL 9 AVDDH 12 NC 13 NC 14 DVDDH 16 DVDDL 18 DVDDL 23 DVDDL 26 VSS 29 DVDDL 30 DVDDH 34 DVDDL 39 DVDDH 40...

Page 26: ...ansfer Mode Naming Schemes The first generation Gen 1 uses 8b 10b encoding while the second generation Gen 2 uses the more efficient 128b 132b encoding This is the reason why the second generation can...

Page 27: ...ving pins should be called RX Please read carefully the datasheet of the USB device device down in order to ensure RX and TX are not confused 2 4 2 1 USB 2 0 OTG Schematic Example If the USB signals a...

Page 28: ...OTG ID signal which can be used with the Verdin module If the port has negotiated being source for the power Downstream Facing Port DFP the VBUS need to be provided The TUSB321 can be strapped to ann...

Page 29: ...GND 100nF 16V C11 GND GND 10uF 10V C13 ESD9101P2T5G D1 GND 12R 100MHz 1 2 3 4 L2 USB_1_CC1 USB_1_CC2 100uF 10V C17 100uF 10V C14 R66 100K V1 8_SW 10K R18 10K R21 28 7K R17 GND GND GND TP15 TP16 TP17 T...

Page 30: ...Speed RX lane TX from the device need to be placed on the carrier board As the capacitors for the TX lane are located on the Verdin module no additional capacitors are required nor permitted on the TX...

Page 31: ...TREAM 4 IC11 USB5744T I 2G USB_2_SSRX_P USB_2_SSRX_N USB_2_SSTX_P USB_2_SSTX_N USB_2_D_P USB_2_D_N USBH_RESET GND GND GND USBH_RBIAS USBH_TEST GND USBH_CFG_BC_EN 4 2 OSC1B QC5A25 0000F10B22R GND 1 3 O...

Page 32: ...lave 159 USB_1_VBUS Leave NC if not used 155 USB_1_EN Leave NC if not used 157 USB_1_OC Add pull up resistor or disable the over current function in software 183 USB_2_D_P Leave NC if not used 181 USB...

Page 33: ...Verdin Signal Name I O Type Power Rail Description 69 HDMI_1_TXC_P O TDMS HDMI DVI differential clock positive 67 HDMI_1_TXC_N O TDMS HDMI DVI differential clock negative 75 HDMI_1_TXD0_P O TDMS HDMI...

Page 34: ..._TXC_P 69 HDMI_1_TXD1_N 79 HDMI_1_TXD0_P 75 HDMI_1_TXC_N 67 HDMI_1_CEC 63 HDMI_1_HPD 61 I2C_3_HDMI_SCL 59 I2C_3_HDMI_SDA 57 HDMI_1_TXD1_P 81 HDMI_1_TXD2_N 85 HDMI_1_TXD2_P 87 X1D 2309409 2 V1 8_SW GND...

Page 35: ...disable the I2C function in software 59 I2C_3_HDMI_SCL Add pull up resistor or disable the I2C function in software Table 13 Unused HDMI DVI signal termination 2 6 Display Serial Interface MIPI DSI Th...

Page 36: ...I2 C a PWM and two GPIOs for the DSI interface These signals are intended to be used for controlling an attached display as well as DSI bridges Some DSI bridges can embed also sound in the interface e...

Page 37: ...Hz 800mA L11 220R 100MHz 800mA L10 220R 100MHz 800mA L5 220R 100MHz 800mA L9 220R 100MHz 800mA L6 220R 100MHz 800mA L7 220R 100MHz 800mA L8 10uF 6 3V C35 100nF 16V C36 GND 10uF 6 3V C22 100nF 16V C23...

Page 38: ...12 RSVD 13 RSVD1 34 RSVD2 1 SCL 15 SDA 16 IRQ 33 REFCLK 17 EN 2 ADDR 64 VCORE 31 IC5 SN65DSI84TPAPRQ1 GND 100nF 16V C35 GND 10nF 16V C36 GND 100nF 16V C33 GND 10nF 16V C34 GND GND R28 10K GND GND DIFF...

Page 39: ...CP D2 I2S_LRCLK D4 I2S_BCLK D5 SD I2S_OSCLK D6 I2S_DATA D7 DPI_D13 D9 DPI_D14 D10 VDD_DSI12 E1 I2C_ADR_SEL E2 VSS E4 TEST3 E5 VPGM0 E6 DPI_D10 E7 DPI_D16 E9 DPI_D15 E10 IC5 DSI_1_D0_N DSI_1_D0_P DSI_1...

Page 40: ...ed to be used as DDC 54 I2C_2_DSI_SDA I O 58 PWM_3_DSI I O CMOS 1 8V Dedicated PWM for the display backlight brightness control could also be used as general purpose IO 8 GPIO_9_DSI I O CMOS 1 8V Dedi...

Page 41: ...ust be taken at the pin numbering Even though the adapter and the carrier board connector are identical the footprint with the pin numbering must be different Figure 34 Carrier board dimensions for MI...

Page 42: ...ware 53 I2C_2_DSI_SDA Add pull up resistor or disable the I2C function in software 19 PWM_3_DSI Leave NC if not used 17 GPIO_9_DSI Leave NC if not used 21 GPIO_10_DSI Leave NC if not used Table 17 Unu...

Page 43: ...e chokes are optional The protection diodes are only required if the cables are accessible and or the display does not have enough protection The chokes can reduce EMI if the LVDS cables are longer Fi...

Page 44: ...fault Speed High Speed 50 MHz 25 MB s 3 3V High Speed SDR12 25 MHz 12 5 MB s 1 8V UHS I SDR25 50 MHz 25 MB s 1 8V DDR50 50 MHz 50 MB s 1 8V SDR50 100 MHz 50 MB s 1 8V SDR104 208 MHz 104 MB s 1 8V Tabl...

Page 45: ...ation All unused SD interface signals can be left unconnected If the SD MMC SDIO ports is unused the signal could be used as GPIO Check the datasheet of the Verdin module whether there are any restric...

Page 46: ...n be configured as GPIO 2 10 UART There are four UART ports available in the Verdin module standard UART_1 and UART_2 are general purpose interfaces The RX and TX signals of these interfaces are in th...

Page 47: ...eral purpose UART_2 143 UART_2_CTS I CMOS 1 8V Clear to Send of general purpose UART_2 151 UART_4_RXD I CMOS 1 8V Received Data for real time core debug UART_4 153 UART_4_TXD O CMOS 1 8V Transmitted D...

Page 48: ...it is recommended to keep the inverter circuit in in the RTS signal to maintain compatibility with different modules and drivers provided by Toradex For some applications it is desirable that the UART...

Page 49: ...e these different behaviors Make sure that the relevant Verdin module and the peripheral devices are set to the same SPI mode SPI Mode Clock Polarity Clock Phase Description 0 0 0 Clock has positive p...

Page 50: ...unication for much higher speed than regular SPI Regular SPI uses individual single data lines for transferring and receiving data full duplex Even though QSPI is very often used as a short form for Q...

Page 51: ...ypes of connectors used for the CAN interface The reference schematic below uses single row pin header as connector Since this is not an official standard some devices might have a different connector...

Page 52: ...nteed to be pin compatible with other Verdin modules The maximum output frequency and the possible duty cycle steps vary between the different Verdin modules Please carefully read the datasheets of Ve...

Page 53: ...ronization signal is used for identifying whether the data belongs to the right or left channel and marks the start of each word In the I2 S standard the sync and clock signal can be generated either...

Page 54: ...Pink SJ1 3535NG PI X22 22R RA13D 22R RA14A 22R RA14B 22R RA14C 22R RA14D I2S_1 0 4 I2S_1_BCLK 30 I2S_1_SYNC 32 I2S_1_D_OUT 34 I2S_1_D_IN 36 I2S_1_MCLK 38 I2S_2_BCLK 42 I2S_2_SYNC 44 I2S_2_D_OUT 46 I2...

Page 55: ...eries resistors should be placed close to the clock output of the module Start with a value of 22 Try to increase this value until the corresponding interface fails due to the signal quality of the cl...

Page 56: ...l for advanced debugging of the main and real time if available operating system 2 19 1 JTAG Signals The JTAG signals have normally an IO voltage level of 1 8V However there could be modules with a di...

Page 57: ...ype Power Rail Description 246 CTRL_RECOVERY_MICO I OD 1 8V Recovery mode strapping input Pull up resistor on module additional pull up on carrier board not allowed 165 USB_1_D_P I O USB USB interface...

Page 58: ...l Switzerland l 41 41 500 48 00 l www toradex com l info toradex com Page 58 2 20 3 Unused Recovery Signal Termination The CTRL_RECOVERY_MICO can be left unconnected if the recovery feature is not nee...

Page 59: ...Common signal and power ground 249 VCC_BACKUP I PWR 3 0V RTC supply can be left unconnected if internal RTC is not used 214 PWR_1V8_MOCI O PWR 1 8V 250mA output for carrier board peripherals Table 36...

Page 60: ...VCC_BACKUP may be available for keeping the RTC running The CTRL_PWR_EN_MOCI and CTRL_SLEEP_MOCI are both low in order to make sure no peripheral rails on the carrier board are enabled CTRL_RESET_MOCI...

Page 61: ...operating system this will start a software shut down or opens a menu which lets the customer decide what to do Pressing the power button longer than 5 seconds will shut the system down immediately wi...

Page 62: ...CTRL_FORCE_OFF_MOCI for the first 400ms after VCC has been applied After the early module rails are ramped up the Verdin module outputs the PWR_1V8_MOCI output rail and releases the CTRL_PWR_EN_MOCI T...

Page 63: ...ce The reset cycle can be initiated by a falling edge on the CTRL_RESET_MICO some modules add some debouncing time or by software In the preferred reset mode cold reset first the SoC reset and the CTR...

Page 64: ...te starts when the CTRL_RESET_MICO is released and the minimum reset time has elapsed The actual reset time depends on the module The rails are turned back on in the same order as during a regular mod...

Page 65: ...a low level at the CTRL_SLEEP_MOCI signal This signal is used by the carrier board for turning off any rails that are not required in the sleep mode It depends on the carrier board design which rails...

Page 66: ...AKE1_MICO is the preferred wake source for keeping a design compatible between different Verdin modules The module re enables the voltage rails and sets the CTRL_SLEEP_MOCI signal high This enables th...

Page 67: ...es or disconnecting services After all processes are stopped the last task of the operating system is to request a shut down from the PMIC The PMIC is first asserting the SoC reset as well as the CTRL...

Page 68: ...s by saving temporary data flushing buffers closing files or disconnecting services On the other hand with force OFF the system can be shut down independently of the state of the operating system or o...

Page 69: ...er than 5 seconds some modules will directly initiate a force OFF sequence Some modules will ignore a long press to the power button if the CTRL_PWR_BTN_MICO was not going high after detecting the pow...

Page 70: ...is removed from the module The only rail that is still optionally supplied to the module is the VCC_BACKUP rail for the on module real time clock The carrier board should avoid of having any signal dr...

Page 71: ...l IC which handles the switching of the main VCC for the module This approach makes use of the CTRL_FORCE_OFF_MOCI signal which switches off VCC after the module has been successfully shutdown 3 4 1 1...

Page 72: ...C rail If the module is running a long pressing of the power button 5s is generating an emergency power shutdown of the system The power button control IC is forwarding the long press event to the CTR...

Page 73: ...over current protection circuit In such cases tweak the soft start functions of the switches and regulators if available For designing the power supply on the carrier board a current consumption budge...

Page 74: ...2 47uF 10V C73 GND GND GND GND 100nF 50V C64 5 0V Iout max 8A GND 10uF 50V C68 10uF 50V C69 GND GND V7 24 GND V5_STB 5V_PGOOD f sw 400KHz Tss 3 3mS GND DCDC1_SS 3 3uH 10A L10 DCDC2_LX 4 7uF 10V C65 GN...

Page 75: ...er power source from 3 135V to 5 5V e g simple barrel connector power supply The 5V from the USB is directly connected to the VCC input voltage of the module No further buck regulator is needed The mo...

Page 76: ...utton CTRL_RESET_MICO is not implemented in such a power scheme it is still possible to do software initiated reset cycles Without implementing a power button CTRL_PWR_BTN_MICO the only option for exi...

Page 77: ...be used up with Verdin modules While this represents only a very small portion of total battery capacity it also helps to prevent battery deep discharge events from happening POWER ON OFF BUTTON Opti...

Page 78: ...uired to be provided to the module The system voltage can range from 3 135V to 4 4V which makes the creation of a 3 3V 5 rail challenging A better approach is to run peripherals from 1 8V and reducing...

Page 79: ...onal and irregular flow of current mainly over the signal path It can happen if interfaces are crossing different power domains Backfeeding can happen between circuit blocks powered by or switched by...

Page 80: ...s can basically be ignored There is a small current flowing from the peripheral output to the input buffer of the SoC This is not backfeeding This is a regular signal current Figure 65 SoC input pin w...

Page 81: ...ffset Even if the module and carrier board are turned off the TMDS signals can be lifted to 3 3V by the monitor If an improper HDMI circuit is used this can cause backfeeding The DDC and the hotplug d...

Page 82: ...specified by a similar formula 0 3 The 0 3V in this formula is dictated by the ESD protection diode According to the device specifications the input voltage always needs to be small enough for not ha...

Page 83: ...r delivery block diagram can help to identify different power domains A power domain is a group of devices or peripherals which are always in the same power state Figure 69 shows a simple example of a...

Page 84: ...ernal peripherals and observe the residual voltage If the voltage drops the peripheral signals are likely a source of backfeeding If you measure residual voltage in one power domain all the input sign...

Page 85: ...other method for estimating the number of backfeeding pins By adding a load resistor to the IO rail and observing the residual voltage changes the total internal resistance of the backfeeding can be e...

Page 86: ...about three times smaller than a single signal pin This means there are probably a total of three similar signal pins that are backfeeding to this IO rail 3 5 5 Backfeeding Prevention There are multip...

Page 87: ...peripherals on the same Domain 3 5 5 2 Avoid Driving Outputs High Backfeeding can be prevented by ensuring the output pin is not driven high while the IO rail of the input side is powered off This is...

Page 88: ...the USB data signals Therefore no further backfeeding prevention is required for these signals on the carrier board Whenever you are selecting peripheral devices it is advised to check whether the in...

Page 89: ...it is recommended to use this PWR_1V8_MOCI for open drain pull up resistors Figure 77 Correct pull up rail for open drain signals 3 5 5 6 Simple FET Circuit for Open Drain Signals Sometimes it is imp...

Page 90: ...xternal resistor The advantage of the internal resistor is that it is using the correct IO rail The biggest drawback of this solution is that the low level of the signal is increased Therefore using a...

Page 91: ...of this document carefully for understanding whether coupling capacitors are required on the carrier board or not Figure 81 Capacitive coupled signals 3 5 5 9 Non Backfeeding Buffer Placing an additi...

Page 92: ...3 5 5 11 Tristate Buffer Tristate buffers that feature an output enable control signal can be a solution For example RS232 transceivers often feature an output enable signal The biggest challenge wit...

Page 93: ...ain signals such as the I2 C bus the FXMA2102L8X from ON Semiconductor prevents backfeeding Figure 85 Level shifter for preventing backfeeding 3 5 5 13 Galvanic Isolation Galvanic isolations in the si...

Page 94: ...g the power on reset or an incorrect device configuration strapped a solution might be adding an extra load to the affected rail Turning this load on only during the power up sequence is advisable for...

Page 95: ...the SODIMM connector there is an area which allows for higher components such as decoupling capacitors or series resistors to be placed The maximum height in this area is listed in the column Compone...

Page 96: ...odule a connector with a larger stacking height is recommended 4 2 Fixation of the Module The SODIMM DDR4 connector comes with an integrated clip mechanism for a fast secure and convenient fixation of...

Page 97: ...connected Figure 91 Module dimension bottom side mm 4 5 Connector and Standoff Land Pattern Requirements The required land pattern depends on the need for additional standoffs The standoffs are optio...

Page 98: ...re 92 Carrier Board Land Pattern mm 4 6 Carrier Board Space Requirements The required PCB area for the module depends on the module fixing method and the cooling solution 0 30 3 00 1 60 1 10 68 80 1 0...

Page 99: ...GND 29 DSI_1_D2_N Differential Pair Output Reserved 31 DSI_1_D2_P Differential Pair Output Reserved 33 GND 35 DSI_1_CLK_N Differential Pair Output Reserved 37 DSI_1_CLK_P Differential Pair Output Rese...

Page 100: ...I_1_D1_N Differential Pair Input Reserved 121 GND 123 CSI_1_D0_P Differential Pair Bidirectional Reserved 125 CSI_1_D0_N Differential Pair Bidirectional Reserved 127 GND 129 UART UART_1_RXD Input 1 8V...

Page 101: ...t 1 8V Reserved 209 GND 211 ETH_2_RGMII_TX_CTL Output 1 8V Reserved 213 ETH_2_RGMII_TXC Output 1 8V Reserved 215 ETH_2_RGMII_TXD_3 Output 1 8V Reserved 217 ETH_2_RGMII_TXD_2 Output 1 8V Reserved 219 E...

Page 102: ...nary Subject to Change Toradex AG l Ebenaustrasse 10 l 6048 Horw l Switzerland l 41 41 500 48 00 l www toradex com l info toradex com Page 102 257 VCC Power Input 3 135 5 5V Always Compatible 259 VCC...

Page 103: ...Bidirectional 1 8V Reserved 34 I2S_1_D_OUT Output 1 8V Reserved 36 I2S_1_D_IN Input 1 8V Reserved 38 I2S_1_MCLK Output 1 8V Reserved 40 GND 42 I2S_2_BCLK Bidirectional 1 8V Reserved 44 I2S_2_SYNC Bidi...

Page 104: ...20 MSP_15 Differential Pair Single Ended Module specific 122 GND 124 MSP_16 Differential Pair Single Ended Module specific 126 MSP_17 Differential Pair Single Ended Module specific 128 MSP_18 GND Low...

Page 105: ...ectional 1 8V Always Compatible 208 GPIO_2 Bidirectional 1 8V Always Compatible 210 GPIO_3 Bidirectional 1 8V Always Compatible 212 GPIO_4 Bidirectional 1 8V Always Compatible 214 PWR_1V8_MOCI 1 8V Ou...

Page 106: ...Change Toradex AG l Ebenaustrasse 10 l 6048 Horw l Switzerland l 41 41 500 48 00 l www toradex com l info toradex com Page 106 258 CTRL_RESET_MOCI Open Drain Output 3 3V Tolerant Always Compatible 260...

Page 107: ..._D3_N 23 24 CAN_2_TX DSI_1_D3_P 25 26 CAN_2_RX GND 27 28 GND I2S DSI_1_D2_N 29 30 I2S_1_BCLK DSI_1_D2_P 31 32 I2S_1_SYNC GND 33 34 I2S_1_D_OUT DSI_1_CLK_N 35 36 I2S_1_D_IN DSI_1_CLK_P 37 38 I2S_1_MCLK...

Page 108: ...112 MSP_11 CSI_1_CLK_N 113 114 MSP_12 GND 115 116 MSP_13 CSI_1_D1_P 117 118 MSP_14 CSI_1_D1_N 119 120 MSP_15 GND 121 122 GND CSI_1_D0_P 123 124 MSP_16 CSI_1_D0_N 125 126 MSP_17 GND 127 128 MSP_18 UART...

Page 109: ...204 GND GPIO ETH_2_RGMII_RXD_2 205 206 GPIO_1 ETH_2_RGMII_RXD_3 207 208 GPIO_2 GND 209 210 GPIO_3 ETH_2_RGMII_TX_CTL 211 212 GPIO_4 ETH_2_RGMII_TXC 213 214 PWR_1V8_MOCI ETH_2_RGMII_TXD_3 215 216 GPIO...

Page 110: ...Design Guide Preliminary Subject to Change Toradex AG l Ebenaustrasse 10 l 6048 Horw l Switzerland l 41 41 500 48 00 l www toradex com l info toradex com Page 110 VCC 257 258 CTRL_RESET_MOCI VCC 259...

Page 111: ...nformation and content in this document are provided as is with no warranties of any kind and are for informational purposes only Data and information have been carefully checked and are believed to b...

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