N1_Hardware_User_Guide
Copyright © Neoway Technology Co., Ltd
44
27
SDC2_CLK
O
High-speed digital clock
CLK
28
SDC2_DATA0
IO
High-speed data line
DATA0
29
SDC2_DATA1
IO
High-speed data line
DATA1
23
SDC2_DATA2
IO
High-speed data line
DATA2
24
SDC2_DATA3
IO
High-speed data line
DATA3
30
SD_CARD_DET_N
I
SD
card
detection,
low-level
interrupt
Low level
VREG_SDC_PWR is the power supply pin of the SD card. It supports a maximum current of 500mA and
dual-voltage of 1.8V/2.95V. The recommended trace width is 0.5 mm. Parallel 0.1 μF and 4.7 μF
capacitors to the SD card.
CMD, CLK, DATA0, DATA1, DATA2 and DATA3 are high-speed signals. Limit their characteristic
impedance to 50Ω and do not let them cross any other traces. Keep length matching for CMD, DATA0,
DATA1, DATA2 and DATA3 traces. CLK trace should be ground separately.
6.3.2 SD Peripheral Interface
SDIO interface can connect other peripherals.
Refer to the SD card connection design, and connect the
module pin to the peripheral pin directly. PCB layout is similar to the SD card design.
6.4 GPIO
N1supports multiple standard interfaces including UART, I2C, and SPI. Configure the GPIO to meet your
requirements for connecting to different devices. For the open multi-function GPIO interface, please
request our FAE.
Table 6-2
GPIO pins
Pin
Signal
General Function
Alternate
Function 1
Alternate
Function 2
GPIO
32
GPIO_15
GPIO_15
BLSP4_SPI_CLK
GP_CLK_2B
15
33
GPIO_14
GPIO_14
BLSP4_SPI_MISO
GP_CLK_1B
14
34
TS_INT_N
TS_INT_N
BLSP4_SPI_MISO
GP_CLK_3B
13
35
TS_RST_N
TS_RST_N
BLSP4_SPI_MOSI
GP_CLK_2B
12
77
SENSORS_I2C_SC
L
SENSORS_I2C_SC
L
BLSP1_SPI_CLK
BLSP1_UART
_RFR_N
7
78
SENSORS_I2C_SD
A
SENSORS_I2C_SD
A
BLSP1_SPI_CS_N
BLSP1_UART
_CTS_N
6
79
UART1_MSM_RX
UART1_MSM_RX/ BLSP1_SPI_MISO
BLSP1_UART
_RX
5
80
UART1_MSM_TX
UART1_MSM_TX/ BLSP1_SPI_MOSI
BLSP1_UART
_TX
4