User's Manual

GS2101M Low Power WiFi Module Data Sheet Pin-out and Signal Description
GS2101Mxx Device Pin-out
GS2101M-DS-001270, Release 1.0 Confidential 37
18
GPIO8/I2C_DATA
(see Note 3 and Note 5)VIN_3V3 Pull-down 12
Digital
Input/Output
GPIO/Inter-Integrated
Circuit Data
19
GPIO32/SDIO_DAT2/
UART1_TX (see Note
3)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/SDIO_DATA Bit
2/UART1 Transmitter
Output
20
GPIO33/SDIO_DAT3/
SPI0_CS_n_0 (see
Note 3)
VIN_3V3 Pull-up 4
Digital
Input/Output
GPIO/SDIO Data Bit
3/SPI0 Chip Select Input 0
from the HOST (Active
Low)
21
GPIO34/SDIO_CMD/
SPI0_DIN (see Note 3)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/SDIO Command
Input/SPI0 Receive Data
Input
22
GPIO35/SDIO_CLK/
SPI0_CLK (see Note
3)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/SDIO Clock/SPI0
Clock Input from the HOST
23
GPIO36/SDIO_DAT0/
SPI0_DOUT (see Note
3) (see Errata E-1)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/SDIO Data Bit
0/SPI0 Transmit Data
Output to the HOST
24
GPIO37/
SDIO_DAT1_INT
(see Note 3 and Note 8)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/4-bit SDIO DATA Bit
1/SDIO SPI Mode Interrupt
25 GND 0V Not Applicable Analog Port Ground
26 NC Not Applicable Not Connected
27
GPIO1/UART0_TX
(see Note 3)
VIN_3V3 Pull-down 4
Digital
Input/Output
GPIO/UART0 Transmitter
Output.
28
GPIO25/UART0_RTS
(see Note 3 and Note 6)
VIN_3V3 Pull-down 12
Digital
Input/Output
GPIO/UART0 Request to
Send Output. This pin is
used for Program Select.
29
GPIO0/UART0_RX
(see Note 3)
VIN_3V3 Pull-down 4
Digital Input
Output
GPIO/UART0 Receive
Input
30
GPIO24/UART0_CTS
(see Note 3 and Note 6)
VIN_3V3 Pull-down 12
Digital
Input/Output
GPIO/UART0 Clear to
Send Input
31
GPIO31/PWM2
(see Note 3 and Note 4)
VIN_3V3 Pull-down 16
Digital
Input/Output
GPIO/Pulse Width
Modulation Output 2.
This pin is used for Program
Mode.
32
GPIO30/PWM1 (see
Note 3)
VIN_3V3 Pull-down 16
Digital
Input/Output
GPIO/Pulse Width
Modulation Output 1
Table 7 GS2101Mxx Module Pin Signal Description (Continued)
Pins Name Voltage
Domain
Internal Bias after
Hardware Reset
Drive
Strength
(mA)
Signal State Description