SimCom SIM802 HD Manual page 21

SIM802 Hardware Design
Pin name I/O
STATUS O
GPIO I/O
DISP_DAT I/O
A
DISP _CLK O
DISP _CS O
DISP _D/C O
DISP _RST O
KBR0 I
Main serial interface
Pin name I/O
RXD I
DTR I
TXD O
RTS I
CTS O
RI O
DCD O
Debug serial interface
Pin name I/O
DBG_TXD O
DBG_RXD I
SIM interface
Pin Name I/O
SIM_VDD O
SIM_DATA I/O
SIM_CLK O
SIM_RST O
SIM802_HD_V2.01
Description
Indicate work status
General Input Output Port
Display interface
Description
Receive data
Data terminal Ready
Transmit data
Request to send
Clear to send
Ring indicator
Description
Serial interface for debug
only
Description
Voltage supply for SIM card
SIM data output
SIM clock
SIM reset
21
DC characteristics
VOLmin=GND
VOLmax=0.2V
VOHmin=
2.93V-0.2
VOHmax= 2.93V
DC characteristics
VILmin=0V
VILmax=0.3*2.93V
VIHmin=0.7*2.93V
VIHmax=
2.93V+0.3
VOLmin=GND
VOLmax=0.2V
VOHmin=
2.93V-0.2
VOHmax= 2.93V
DC characteristics
DC characteristics
The voltage can be
select by software
either 1.8V or 3V
VILmin=0V
VILmax=0.3*SIM_
VDD
VIHmin=0.7*SIM_
Comment
If unused keep
pins open
If unused keep
pins open
Pull up inside, if
unused keep pin
open
Comment
If only use TXD,
RXD, GND three
pins to
communicate,
RTS Pin connect
to GND directly.
DTR Pin is
pulled up inside.
If unused keep
pins open
Comment
If unused keep
pins open
Comment
All signals of SIM
interface are
protected against
ESD with a TVS
12.01.2010