SIM5218E Hardware Design
SIM5218E_ Hardware Design_V1.06
2012.09.21
14
Figure 2
：
SIM5218E block diagram
3.1 SIM5218E pin description
Table 5
：
Board-to-Board Connector pin description
Power Supply
PIN NAME
I/O
DESCRIPTION
DC CHARACTERISTICS
VBAT
Six BAT pins of the board-to-board
connector are dedicated to connect
the supply voltage. The power supply
of SIM5218E has to be a single
voltage source of VBAT= 3.4V...4.2V.
It must be able to provide sufficient
current in a transmit burst which
typically rises to 2A. Mostly, these
six pins are voltage input.
Vmax= 4.2V
Vmin=3.4V
Vnorm=3.8V
VRTC
Current input for RTC when the
battery is not supplied for the system.
Current output for backup battery
when the main battery is present and
the backup battery is in low voltage
state. If not in use, left open.
Vmax=3.2V
Vnorm=3.0V
Vmin=1.5V
Inorm= 1.1uA
GND
Digital ground
Power on or power off
PIN NAME
I/O
DESCRIPTION
DC CHARACTERISTICS
POWER_ON
I
Voltage input for power on key.
POWER_ON get a low level voltage
for user to power on or power off
the system. The user should keep it to
VILmax=0.2*VDD_EXT
VIHmin=0.6* VDD_EXT
VImax= 0.3
Содержание SimCom SIM5218E
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