Confidential
MANUAL
32(51)
Document number
Revision
7/198 17-LXE 108 566 Uen
A
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Group
Pin No
Name
Application Requirements
App I/O
19
PCMDLD
Logic input from phone module.
I
20
PCMULD
Logic output to phone module.
O
18
PCMSYNC
Logic input from phone module.
I
PCM
17
PCMCLK
Logic input from phone module.
I
9 AGND
Analog reference. This signal is an analog reference
output by the phone module. This signal is connected
to GND in one place in the phone module. Under no
circumstances shall it be connected to any ground or
be used as ground in the application.
I
10
ATMS
Single ended audio output to phone module.
O
Analog
Audio
7
AFMS
Single ended audio input from phone module.
I
12
MODULE_PWR_
EN_B
Logic open collector output that is set low by the
application to enable power to the phone module. The
pull-up resistor resides in the phone module.
OOC
2 VREF
Phone module logic voltage reference input to
application. This signal provides the application with
the logic system voltage level used by the phone
module. Also used as an application wakeup signal if
used together with RTC.
I
40 RI
This signal is used to indicate to the application of an
incoming call (voice, data, etc.). A falling edge
indicates incoming call. The signal remains low for one
second, then high for three seconds. This is repeated
until call is answered or dropped.
I
24 RINGER
Pulse Modulated logic input from phone module. The
application must provide power amplification if the
current draw is expected to exceed 1mA.
I
Status
15 HW_SD
Bi-directional signal, default set to be an open collector
output from the application.
OOC
I
39
CFMS
Flash output from phone module.
I
Flash
37
CTMS
Flash input to phone module
O
36
SCL_SPI_CLK
No termination. Leave open.
IOC
35
SDA_SPI_IN
No termination. Leave open.
IOC
38
SPI_OUT
No termination. Leave open.
O
Unused
1
IO_1_TIMEMARK No termination. Leave open.
I/O
3 SIMCLK
SIM
Clock
I
11
SIMDET
SIM Detect line
O
13 SIMRST
SIM
Reset
I
14
SIMVCC
SIM Supply voltage
I
External
SIM
Interface
16 SIMDATA
SIM
Data
I/O
4 VRTC
P
33, 34
VCC_MAIN
P
29, 31, 32
VCC_AUX
P
Power
5, 6, 8,
21, 22
GND
P
Table 26: Pin Direction for General Purpose Signals