SimCom SIM802 HD, Руководство пользователя

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