SIM340 Hardware Design
A
A
DISP_CLK O/4mA
DISP_CS
O/4mA
DISP_D/C
O/4mA
DISP_RST
O/4mA
keep pins
open
NETLIGHT O/4mA Network status indication
GPIO0
I/O/4m
A
Normal input/output port
If unused
keep pins
open
Serial port
PIN NAME I/O
DESCRIPTION
DC CHARACTERISTICS
DTR
I/8mA
Data terminal ready
RXD
I/8mA
Receive data
TXD
O/8mA Transmit data
RTS
I/8mA
Request to send
CTS
O/8mA Clear to send
RI
O/8mA Ring indicator
DCD
O/4mA Data carrier detection
VILmin=0V
VILmax=0.3*VDD_EXT
VIHmin=0.7*VDD_EXT
VIHmax= 0.3
VOLmin=GND
VOLmax=0.2V
VOHmin= VDD_EXT-0.2
VOHmax= VDD_EXT
If use only
TXD,RXD
GND three
pins to
communicate,
RTS pin
connect to
GND directly.
DTR pin is
pull up to
VEXT with
100K
If unused
keep pins
open
Debug port
DBG_TXD O/4mA
DBG_RXD I/4mA
Serial interface for debugging only
If unused
keep pins
open
SIM interface
PIN NAME I/O
DESCRIPTION
DC CHARACTERISTICS
SIM_VDD
O
Voltage supply for SIM card
The voltage can be select All signals of
SIM340_HD_V3.09
18.03.2009
20
Содержание SimCom SIM340
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