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8. USB Port and External Powering

The USB port on the Si5xxUC-EVB utilizes a micro-USB connector that is located on the left edge of the board on bottom side. A 2
meter micro USB cable is provided with the EVB kit. Any micro USB cable can be used that supports full USB connectivity.

If powering the EVB via the USB port, make sure switch SW5 is in the “USB” position. If properly connected to a live USB port, the
green VBUS_5V should illuminate.

If powering the board via an ex5V power supply, make sure SW5 is in the “EXT” position. Once +5V is connected to the board
via the +5V_EXT connections, the green +5V_EXT LED should illuminate.

UG298: Si5xxUC-EVB

USB Port and External Powering

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Summary of Contents for Si5 UC-EVB Series

Page 1: ... for superior signal integrity KEY FEATURES Evaluation of any Silicon Labs XO or VCXO Si51x Si53x Si54x Si55x Si56x Si57x Si59x AC coupled differential single ended output clocks Voltage control Vc port for VCXO evalution Switch selectable settings No jumpers External power or USB powered Use stand alone or with our Pro grammable Oscillator Calculator SW tool XO Location 1 5mm x 7mm Output Termina...

Page 2: ...tch Pin_2_Ctrl 9 5 3 Oscillator Pin 7 Control DIP Switch Pin_7_Ctrl 10 5 4 Oscillator Pin 8 Control DIP Switch Pin_8_Ctrl 11 6 Supported Devices Stand Alone Mode 12 7 Supported Devices Software Controlled Mode I2C 15 8 USB Port and External Powering 16 9 Output Clock Terminations 17 10 EVB Test Points and LEDs 18 10 1 Test Points 18 10 2 LEDs 18 11 VCXO Voltage Control Input Circuit 19 12 Programm...

Page 3: ...ported Devices Stand Alone Mode or 7 Supported Devices Software Controlled Mode I2C 3 Verify output termination is appropriate for your device see Section 9 Output Clock Terminations for more info 4 Set 5V Select switch SW5 based on how you will power the EVB either via USB or via external 5V supply 5 Connect power either via USB port or external 5V power supply as chosen in previous step 6 Output...

Page 4: ...s Software controlled mode The software controlled mode is for use with PC based software tools such as our Programmable Os cillator Calculator Tool to control configure the device being evaluated via the device I2C bus The software controlled mode is pri marily intended for I2C controlled XO VCXO devices When using software controlled mode some of the on board switches must be placed in specific ...

Page 5: ...installed in any one of the three locations on the Si5xxUC EVB This restriction is made to ensure no problems will occur due to potential signal crosstalk power supply over loading coupling or signal contention loading between multiple devices Do not simply remove power from a mounted device in an attempt to place it in an unused but still mounted state Board control signals are wired in parallel ...

Page 6: ...low By default this switch is set to 1 8V and will need to be changed if evaluating a non I2C oscillator with 2 5V or 3 3V VDD Software controlled mode Power can be sourced from either external power supply or USB port but the Programmable Oscillator Software tool can be used to set the VDD voltage to the oscillator In software controlled mode VDD_DUT_SEL switches should remain set to 1 8V setting...

Page 7: ... be instal led in the same location and will fit within the 8 pin footprint Device Pin out Mapping 4 pin Device 6 pin Device 8 pin Device DIP Switch Function Options 1 1 1 Pin_1_Ctrl SW1 FS OE SDA Vc 2 2 Pin_2_Ctrl SW2 FS OE SCL 2 3 3 GND1 3 4 4 Output1 5 5 Output1 4 6 6 VDD1 7 Pin_7_Ctrl SW3 FS SDA 8 Pin_8_Ctrl SW4 FS SCL Note 1 Fixed function pins Configuration details of each of the 4 variable ...

Page 8: ...he ON position at a time Switching more than 1 switch to the on position at a time may cause undesired behavior All switches can be set to OFF position to effectively isolate pin 1 from any signal source and is the No Connect NC state To determine the required Pin 1 switch settings for your specific device please refer to the Supported Device Tables in Chapter 6 Supported Devices Stand Alone Mode ...

Page 9: ...tion at a time Switching more than 1 switch to the ON position at a time may cause undesired behavior All switches set to OFF position effectively isolates pin 2 from any signal source and is the No Connect NC state To determine the required Pin 2 switch settings for your specific device please refer to the Supported Device Tables in Chapter 6 Supported Devices Stand Alone Mode and Chapter 7 Suppo...

Page 10: ... position at a time Switching more than 1 switch to the ON position at a time may cause undesired behavior All switches set to OFF position effectively isolates pin 7 from any signal source and is the No Connect NC state To determine the required Pin 7 switch settings for your specific device please refer to the Supported Device Tables in Chapter 6 Supported Devices Stand Alone Mode and Chapter 7 ...

Page 11: ... ON position at a time Switching more than 1 switch to the ON position at a time may cause undesired behavior All switches set to OFF position effectively isolates pin 8 from any signal source and is the No Connect NC state To determine the required Pin 8 switch settings for your specific device please refer to the Supported Device Tables in Chapter 6 Supported Devices Stand Alone Mode and Chapter...

Page 12: ...Dual 6 5x7 3 2x5 OE FS FS OE CLK CLK Si562 XO Quad 8 5x7 3 2x5 OE NC NC OE FS1 FS0 CLK CLK Si564 XO Single Dual Quad or I2C 8 5x7 3 2x5 OE NC FS OE NC FS SDA FS1 SCL FS0 CLK CLK Si540 XO Single 6 5x7 3 2x5 OE NC NC OE CLK CLK Si541 XO Dual 6 5x7 3 2x5 OE FS FS OE CLK CLK Si542 XO Quad 8 5x7 3 2x5 OE NC NC OE FS1 FS0 CLK CLK Si544 XO Single Dual Quad or I2C 8 5x7 3 2x5 OE NC FS OE NC FS SDA FS1 SCL...

Page 13: ... 6 5x7 3 2x5 OE NC CLK CLK Si510 XO Single CMOS 4 5x7 3 2x5 2 5x3 2 OE CLK Si510 XO Single Diff 6 5x7 3 2x5 2 5x3 2 NC OE CLK CLK Si511 XO Single 6 5x7 3 2x5 2 5x3 2 OE NC CLK CLK Si512 XO Dual CMOS 6 5x7 3 2x5 2 5x3 2 FS OE CLK NC Si512 XO Dual Diff 6 5x7 3 2x5 2 5x3 2 FS OE CLK CLK Si513 XO Dual CMOS 6 5x7 3 2x5 2 5x3 2 OE FS CLK NC Si513 XO Dual Diff 6 5x7 3 2x5 2 5x3 2 OE FS CLK CLK 4 pin devi...

Page 14: ...0 VCXO Single 6 5x7 Vc OE CLK CLK Si552 VCXO Dual 6 5x7 Vc FS CLK CLK Si554 VCXO Quad 8 5x7 Vc OE FS1 FS0 CLK CLK Si595 VCXO Single 6 5x7 3 2x5 Vc OE CLK CLK Si596 VCXO Dual 6 5x7 3 2x5 Vc FS CLK CLK Si597 VCXO Quad 8 5x7 Vc OE FS1 FS0 CLK CLK Si515 VCXO Single CMOS 6 5x7 3 2x5 2 5x3 2 Vc OE CLK NC Si515 VCXO Single Diff 6 5x7 3 2x5 2 5x3 2 Vc OE CLK CLK Si516 VCXO Dual CMOS 6 5x7 3 2x5 2 5x3 2 Vc...

Page 15: ... Pkg sizes mm x mm Pin 1 Control Pin 2 Control Pin 7 Control Pin 8 Control Pin 4 Out put Pin 5 Out put Si564 XO I2C or Single Dual Quad 8 5x7 3 2x5 OE NC FS OE NC FS SDA FS1 SCL FS0 CLK CLK Si544 XO I2C or Single Dual Quad 8 5x7 3 2x5 OE NC FS OE NC FS SDA FS1 SCL FS0 CLK CLK Si549 XO I2C or Single Dual Quad 8 5x7 3 2x5 OE NC FS OE NC FS SDA FS1 SCL FS0 CLK CLK Si570 XO I2C 8 5x7 NC OE SDA SCL CLK...

Page 16: ...B connectivity If powering the EVB via the USB port make sure switch SW5 is in the USB position If properly connected to a live USB port the green VBUS_5V should illuminate If powering the board via an external 5V power supply make sure SW5 is in the EXT position Once 5V is connected to the board via the 5V_EXT connections the green 5V_EXT LED should illuminate UG298 Si5xxUC EVB USB Port and Exter...

Page 17: ...tion note for details of required output source termination for the specific device being evaluated Figure 9 1 CLK1 Output Default Terminations Table 9 1 Example Output Clock Source Terminations Si51x Si53x Si54x Si55x Si56x Si57x and Si59x only Output Format Series Resistor Position e g R4 R6 Parallel Resistor Position e g R5 R7 Series Capacitor Position e g C3 C5 LVPECL 3 3V AC coupled 0 Ω 130 Ω...

Page 18: ...d across these 2 test points corresponds to the current through the resistor For example if the measured voltage is 75 mV the current flow is 75 mA Each oscillator site has this current sense circuit Figure 10 1 Current Sense Test Points 10 2 LEDs The Si5xxUC EVB has 5 status LEDs as shown in table below The board silkscreen identifies each LED Table 10 1 Status LEDs LED name Color Location Descri...

Page 19: ...be applied using the J1 SMA connector or using TP3 TP6 A simple RC circuit is included to low pass filter any noise on the input The RC circuit components can be removed or modified as required for your application Figure 11 1 VCXO Control Voltage Input VC_IN UG298 Si5xxUC EVB VCXO Voltage Control Input Circuit silabs com Building a more connected world Rev 0 3 19 ...

Page 20: ...are Tool can be used with the Si5xxUC EVB This tool and corresponding Programmable Oscillator Software Tool User s Guide can be found www silabs com oscillator tools UG298 Si5xxUC EVB Programmable Oscillator Calculator Tool silabs com Building a more connected world Rev 0 3 20 ...

Page 21: ...13 Layout of Board UG298 Si5xxUC EVB Layout of Board silabs com Building a more connected world Rev 0 3 21 ...

Page 22: ...14 Si5xxUC EVB Schematic UG298 Si5xxUC EVB Si5xxUC EVB Schematic silabs com Building a more connected world Rev 0 3 22 ...

Page 23: ...UG298 Si5xxUC EVB Si5xxUC EVB Schematic silabs com Building a more connected world Rev 0 3 23 ...

Page 24: ...ot imply or express copyright licenses granted hereunder to design or fabricate any integrated circuits The products are not designed or authorized to be used within any Life Support System without the specific written consent of Silicon Labs A Life Support System is any product or system intended to support or sustain life and or health which if it fails can be reasonably expected to result in si...

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