SimCom SIM7000G User Manual page 18

SIM interface
SIM_DATA 31
SIM_RST 33
SIM_CLK 32
SIM_VDD 30
SIM_DET 34
USB
USB_VBUS 24
USB_DP 27
USB_DM 28
UART interface
DTR 3
RI 4
DCD 5
CTS 7
RTS 8
TXD 9
RXD 10
I2C interface
I2C_SDA 37
I2C_SCL 38
PCM interface
PCM_CLK 11
PCM_SYNC 12
PCM_DIN 13
PCM_DOUT 14
SIM7000 _Hardware Design _V1.00
SIM Card data I/O, which has
been pulled up via a 10KR
I/O,PU resistor to SIM_VDD
internally. Do not pull it up or
down externally.
DO SIM Reset
DO SIM clock
Power output for SIM card, its
output Voltage depends on SIM
PO
card type automatically. Its
output current is up to 50mA.
DI SIM card detecting input
Valid USB detection input with
DI,PD
3.5~5.25V detection voltage
Positive line of the differential,
I/O
bi-directional USB signal.
Negative line of the differential,
I/O
bi-directional USB signal.
DI,PU DTE get ready
DOH Ring Indicator
DOH Carrier detects
DOH Clear to Send
DI,PU Request to send
DOH Transmit Data
DI,PU Receive Data
I/O I2C clock output
DO I2C data input/output
DO PCM data bit clock.
DO PCM data frame sync signal.
DI PCM data input.
DO PCM data output.
Smart Machine Smart Decision
All lines of SIM
interface should be
protected against ESD.
If used, keep a 10k Ω
resistor pulling up to
the VDD_EXT
If unused, keep them
open.
If unused, keep open,
or else pull them up
via 2.2KΩ resistors to
the VDD_EXT.
If unused, please keep
them open.
2017-05-23