Sim5218E Pin Description - SimCom SIM5218E Hardware Design

SIM5218E Hardware Design

3.1 SIM5218E pin description

Table 5：Board-to-Board Connector pin description
Power Supply
PIN NAME
VBAT
VRTC
GND
Power on or power off
PIN NAME
POWER_ON
SIM5218E_HD_V1.03
Figure 2：SIM5218E block diagram
I/O DESCRIPTION
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...4.4V.
It must be able to provide sufficient
current in a transmit burst which
typically rises to 2A.mostly, these six
pins are voltage input
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.
Digital ground
I/O DESCRIPTION
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
15
DC CHARACTERISTICS
Vmax= 4.2V
Vmin=3.4V
Vnorm=3.8V
Vmax=3.2V
Vnorm=3.0V
Vmin=1.5V
Inorm= 1.1uA
DC CHARACTERISTICS
VILmax=0.2*VBAT
VIHmin=0.6*VBAT
VImax=VBAT
11.06.2009