User's Manual

Smart Machine Smart Decision
SIM7100A_User Manual_V1.01 2014-12-11
19
USB_ID 16 DI High-speed USB ID
If SIM7100A is
peripheral (USB
device), please keep it
open. If SIM7100A is
USB host, please
connect to GND
directly.
UART interface
RTS 66 DO Request to send
CTS 67 DI Clear to Send
RXD 68 DI Receive Data
RI 69 DO Ring Indicator
DCD 70 DO Carrier detects
TXD 71 DO Transmit Data
DTR 72 DI DTE get ready
I2C interface
SCL 55 DO I2C clock output
Please place 2
external Pull-up 2.2kR
resistors to VDD_1V8
for using I2C bus.
If unused, keep open.
SDA 56 I/O I2C data
Keypad interface
KBR0 29 DO Bit 0 drive to the pad matrix
All Keypad pins can
be configured as
GPIOs.
KBC0, KBC1, KBC2,
KBC3, KBR0 and
KBR2 can be
configured as SD2,
please refer to SDIO
description for more
details.
If unused, please keep
open.
KBR1 33 DO Bit 1 drive to the pad matrix
KBR2 30 DO Bit 2 drive to the pad matrix
KBR3 35 DO Bit 3 drive to the pad matrix
KBR4 34 DO Bit 4 drive to the pad matrix
KBC0 28 DI
Bit 0 for sensing key press on pad
matrix
KBC1 27 DI
Bit 1 for sensing key press on pad
matrix
KBC2 31 DI
Bit 2 for sensing key press on pad
matrix
KBC3 32 DI
Bit 3 for sensing key press on pad
matrix
KBC4 36 DI
Bit 4 for sensing key press on pad
matrix
PCM interface
PCM_OUT 73 DO
PCM data output. It also can be
multiplexed as GPIO5.
If unused, please keep
open.
PCM_IN 74 DI
PCM data input. It also can be
multiplexed as GPIO0 with
module wake/interrupt.