SIM5218E Hardware Design
SIM5218E_ Hardware Design_V1.06
2012.09.21
16
CAM_STANDBY
O
Power-down mode selection
“0”=Normal mode, “1”=Power-down
mode
USB
PIN NAME
I/O
DESCRIPTION
DC CHARACTERISTICS
USB_VBUS
I
USB power supply input, if not in
use, left open.
Vmax=5.25V
Vmin=4.4V
Vnorm=5.0V
USB_DP
I/O
Plus (+) line of the differential,
bi-directional USB signal to/from the
peripheral device. If not in use, left
open.
USB_DM
I/O
Minus (-) line of the differential,
bi-directional USB signal to/from the
peripheral device. If not in use, left
open.
They are compliant with
the USB 2.0 specification.
Serial interface
PIN NAME
I/O
DESCRIPTION
DC CHARACTERISTICS
UART_DTR
I
Data Terminal Ready, if not in use,
left open.
UART_RXD
I
Receive Data, which has been pulled
down with a 15kR resistor to ground
in module, if not in use, left open. So
please do not pull up or pull down in
user’s application circuit.
UART_TXD
O
Transmit Data, if not in use, left open.
UART_RTS
O
Request to Send, if not in use, left
open.
UART_CTS
I
Clear to Send, if not in use, left open.
UART_RI
O
Ring Indicator, if not in use, left
open.
UART_DCD
O
Data Carrier detection, if not in use,
left open.
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
USIM interface
PIN NAME
I/O
DESCRIPTION
DC CHARACTERISTICS
V_USIM
O
Voltage Supply for SIM card
The voltage can be
selected by software to be
either 1.8V or 3V
USIM_DATA
I/O
SIM Data Output/Input, which has
been pulled up with a 22kR resistor to
V_USIM in module. So please do not
pull up or pull down in user’s
application circuit.
VILmin=0V
VILmax=0.3*V_USIM
VIHmin=0.7* V_USIM
VIHmax=0.3
VOL i GND
