EG_GenPro78e_1003_UG_007_UK
Page 32 / 41
Description and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modifications.
7.4.2 Loud-speaker
Differential outputs are used to help reduce common–mode and TDMA noise.
The loud-speaker may be connected directly to the output pins.
Table: Pins description
Signal name
Pin number Sub HD
Connector
I/O
Type
Description
CSPK2P 10 O
Analogue Loud-speaker
+ve
CSPK2N 15 O
Analogue Loud-speaker
-ve
7.5 RESET
7.5.1 General
A low level input on this pin (over at least 10ms) allows a forced emergency hardware RESET of the modem.
In this case it acts as an input. It must be driven by an open-collector circuit.
•
PIN
14
(RESET)
AT
0,
TO RESET THE MODEM
,
•
pin 14 (RESET) at 1, normal operating mode.
This pin may also be used to provide a RESET to an external equipment. In this case it acts as an output. If
an external RESET is not required it may be left unconnected.
Table: Pin description
Signal
Pin number on Sub HD
Connector
I/O
Type
Description
RESET 14 I/O
SCHMITT
Reset
Modem
WARNING: This signal must only be used in a case of emergency. A software RESET is always
preferable to a hardware RESET. It is strongly unadvised to execute a RESET whilst in
communication or dialogue without having first detached from the network operator
7.5.2 RESET sequence
To activate the emergency RESET sequence, the RESET signal may be pulled to a low level for at least
10ms.
After the modem has been RESET, if a SIM card is present in the reader there will be a delay whilst it is
initialised before being accessible.
