Checkpoint Systems Inc. EVOLVES10 Manuale Utente
Chapter 11 – SocketModem EDGE (MTSMC-E)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342D)
137
Pin Configurations
SocketModem EDGE Pins
EDGE Pin Descriptions
Pin #
Signal
Name
Name
In Out
Type
Description
9
Dummy
Dummy
22 MIC+
I Wireless
23 MIC–
O Wireless
24 –Reset
I Device Reset (with pull-up).
The active low –RESET input resets the device logic and returns the
configuration of the device to the original factory default values of "stored
values" in the NVRAM.
–RESET is tied to VCC through a time-constant circuit for “Power-on-Reset”
functionality. The module is ready to accept commands after a fixed amount of
time after power-on or reset.
configuration of the device to the original factory default values of "stored
values" in the NVRAM.
–RESET is tied to VCC through a time-constant circuit for “Power-on-Reset”
functionality. The module is ready to accept commands after a fixed amount of
time after power-on or reset.
26 GND
GND Ground
33 –RTS
I The –RTS signal is used for hardware flow control.
34 –RXD
O Data Set Ready. The –DSR indicates modem status to the DTE. –DSR OFF
(high) indicates that the DTE is to disregard all signals appearing on the
interchange circuits except Ring Indicator (–RI). It reflects the status of the
local data set and does not indicate an actual link with any remote data
equipment.
interchange circuits except Ring Indicator (–RI). It reflects the status of the
local data set and does not indicate an actual link with any remote data
equipment.
35 –DSR
O Clear To Send. –CTS is controlled by the modem to indicate whether or not
the modem is ready to transmit data. –CTS ON, indicates to the DTE that
signals presented on TXD will be transmitted. –CTS OFF indicates to the DTE
that it should not transfer data across the interface on TXD.
signals presented on TXD will be transmitted. –CTS OFF indicates to the DTE
that it should not transfer data across the interface on TXD.
36 –RI
/
3.3V
O
RING (Active Low). Incoming ring signal from phone.
Ring Indicate. –RI output ON (low) indicates the presence of an ON segment
of a ring signal on the telephone line. The modem will not go off-hook when –
RI is active; the modem waits for –RI to go inactive before going off-hook.
Ring Indicate. –RI output ON (low) indicates the presence of an ON segment
of a ring signal on the telephone line. The modem will not go off-hook when –
RI is active; the modem waits for –RI to go inactive before going off-hook.
38 –CTS
O Clear to Send (Active Low). –CTS is controlled by the module to indicate
whether or not the module is ready to transmit data. –CTS ON indicates to the
DTE that signals on TXD will be transmitted. –CTS OFF indicates to the DTE
that it should not transfer data on TXD.
DTE that signals on TXD will be transmitted. –CTS OFF indicates to the DTE
that it should not transfer data on TXD.