SimCom SIM5218E Hardware Design page 17

SIM5218E Hardware Design
Audio interfaces
PIN NAME
MIC_P
MIC_N
HP_MICP
EAR_P
EAR_N
HPR
HPL
SPK_P
SPK_N
ADC
VREG_AUX1
USB
PIN NAME
USB_VBUS
USB_DP
USB_DM
Serial interface
PIN NAME
UART_DTR
UART_RXD
UART_TXD
SIM5218E_HD_V1.03
low level for at least 64mS when
power on or power off the system.
Because the system need margin time
assert the software.
I/O DESCRIPTION
I Positive and negative voice-band
input
I Auxiliary positive voice-band input,
If not use, connect to ground through
a 100N cap
O Positive and negative voice-band
output, if not use ,left open
O Auxiliary right channel and left
channel voice-band output, if not use,
left open.
O Loud Speaker Output, if not use ,left
open
I Analog Digital Converter Input
O LDO power output
I/O DESCRIPTION
I USB power supply input, if not use,
left open.
I/O Plus (+) line of the differential,
bi-directional USB signal to/from the
peripheral device. If not use, left
open.
I/O Minus (-) line of the differential,
bi-directional USB signal to/from the
peripheral device. If not use, left
open.
I/O DESCRIPTION
I Data Terminal Ready, if not use, left
open.
I Receive Data, which has been pulled
down with a 15kR resistor to ground
in module, if not use, left open. So
please don't pull up or pull down in
your application circuit.
O Transmit Data, if not use, left open.
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DC CHARACTERISTICS
Audio DC Characteristics
refer to chapter 3.9.4
DC CHARACTERISTICS
DC CHARACTERISTICS
VILmin=0V
VILmax=0.3*VDD_EXT
VIHmin=0.7*VDD_EXT
VIHmax= VDD_EXT+0.3
VOLmin=GND
VOLmax=0.2V
VOHmin= VDD_EXT-0.2
VOHmax= VDD_EXT
11.06.2009
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