Operating Modes - SimCom SIM548C HD V1.01 Hardware Design

SIM548C Hardware Design
Serial port
PIN NAME
DTR
RXD
TXD
RTS
CTS
RI
DCD
Debug port
DBG_TXD
DBG_RXD
SIM interface
PIN NAME
SIM_VDD
SIM_DATA
SIM_CLK
SIM_PRESENCE
SIM_RST
AUXADC
PIN NAME
ADC0
TEMP_BAT

3.2 Operating modes

The table below briefly summarizes the various operating modes referred to in the following
chapters.
SIM548C_HD_V1.01
I/O DESCRIPTION
I Data terminal ready
I Receive data
O Transmit data
I Request to send
O Clear to send
O Ring indicator
O Data carrier detection
O
Serial interface for debugging only
I
I/O DESCRIPTION
O Voltage supply for SIM card
I/O SIM data output
O SIM clock
I SIM card detection
O SIM reset
I/O DESCRIPTION
General purpose analog to digital
I
converter.
For measure the battery temperature
I
21
DC CHARACTERISTICS
VILmin=0V
VILmax=0.9V
VIHmin=2.0V
VIHmax= 3.2V
VOLmin=GND
VOLmax=0.2V
VOHmin=2.7V
VOHmax=2.9V
DC CHARACTERISTICS
The voltage can be select
by software automatically
either 1.8V or 3V
VILmin=0V
VILmax=0.3* SIM_VDD
VIHmin=0.7* SIM_VDD
VIHmax= SIM_VDD +0.3
VOLmin=GND
VOLmax=0.2V
VOHmin= SIM_VDD -0.2
VOHmax= SIM_VDD
DC CHARACTERISTICS
Input voltage range: 0V to
2.4V
0-1.2V
09.05.2008