System Connector Io Functionality - Wavecom CM52 Integrator's Manual

3.5

System connector IO functionality

Note 1: The application IO can be one of the following listed types:
I
IOC
O
OOC
I/O
The pin direction in this table is referenced from the application's point of view.
Group Pin
No
HW flow control is by default enabled in the phone module.
27
30
28
25
26
Data
23
PCM 19
20
18
CM52 Integrators' Manual
WI_DEV_CM52_UGD_001-001
Page 47 of 53
Logic input (no pull up or pull down resistors required).
Logic open-collector input.
Logic output (no pull up or pull down resistors required).
Logic open-collector output.
Logic I/O.
Name Application Requirements
TD (DTMS) Logic output to phone module. The application shall set this
output high upon start-up.
RD (DFMS) Logic input from phone module.
RTS Logic output to phone module. Pulled down by the phone module
(R > 20k). The application shall set this pin low when ready to
receive data.
CTS Logic input from phone module. This signal is initially set high,
indicating that the phone module is not ready to receive data. It is
set low when the phone module is ready to receive data.
DTR Logic output to phone module. This signal is pulled up in the
phone module (R > 20k).
This signal should be set low by the application during a data call.
A low to high transition will terminate the data call.
This signal is asserted by the application when it wishes to open a
communications channel. The phone module then prepares the
modem to be connected to the telephone circuit, and, once
connected, maintains the connection. When DTR is de-asserted,
the phone module is switched to "on-hook" to terminate the
connection.
VPPFLASH/DC DCD: Logic input from phone module. This signal is set default
D high. It goes low indicating that a data call is established,
(CONNECT) received from remote modem. The signal goes high
when data connection is disconnected.
Sent from the phone module (DCE) to the application (DTE) to
indicate that it has received a basic carrier signal from a (remote)
DCE.
VPPFLASH: The application shall not apply a voltage to this pin
unless they intend to use it as VPPFLASH in which case it
becomes a power output.
PCMULD Logic output to phone module.
PCMDLD Logic input from phone module.
PCMSYNC Logic input from phone module.
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable
CM52 Integrators' Manual
App
I/O
O
I
O
I
O
I/O
O
I
I