Checkpoint Systems Inc. EVOLVES10 Manual De Usuario
Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342D)
11
Pin
Signal
Name
Name
In/Out Description
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 or "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
(“X” Time) after power-on or reset.
Model
The active low –RESET input resets the device logic and returns the configuration of
the device to the original factory default values or "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
(“X” Time) after power-on or reset.
Model
Time Constant
"X" Time
Minimum Reset Pulse*
MT5600SMI
250 ms
6 seconds
100us
MT5656SMI
250 ms
6 seconds
100us
MT5634SMI
400 ms
6 seconds
100us
MT2456SMI-22
250 ms
6 seconds
100us
MT2456SMI-IP
250 ms
6 seconds
100us
MTXCSEM
250 ms
6 seconds
100us
MT128SMI
200 ms
6 seconds
100us
MTS2BTSMI
250 ms
6 seconds
100us
MTSMC-E
250 ms
6 seconds
100us
*The SocketModem device may respond to a shorter reset pulse.
Reset Line Interface for the MT5656SMI, MT2456SMI, MT2456SMI-IP
The modem’s reset line employs a .01uF cap and a 10K pull up resistor. Care must
be taken to ensure the system the modem is place into is not affected by the added
capacitance of the reset line. It is not advisable to use an open collector driver in the
embedded system's reset circuitry to drive a reset signal to the embedded modem
and other I.C.s in the customer’s design. Rather, if an open collector driver is to be
used, run that output to the modem only and use a separate driver for other
embedded components. The modem’s reset signal may also be driven by a circuit
that both sinks and sources current if desired.
It is also important to note that these modems do not require an external
reset. They have their own internal reset circuitry and voltage monitor and will
function correctly even if the reset input is open.
be taken to ensure the system the modem is place into is not affected by the added
capacitance of the reset line. It is not advisable to use an open collector driver in the
embedded system's reset circuitry to drive a reset signal to the embedded modem
and other I.C.s in the customer’s design. Rather, if an open collector driver is to be
used, run that output to the modem only and use a separate driver for other
embedded components. The modem’s reset signal may also be driven by a circuit
that both sinks and sources current if desired.
It is also important to note that these modems do not require an external
reset. They have their own internal reset circuitry and voltage monitor and will
function correctly even if the reset input is open.
Reset Wireless GSM/GPRS and CDMA
This signal is used to force a reset procedure by providing low level during reset of
at least 500us. The signal is considered an emergency reset only. A reset procedure
is already driven by internal hardware during the power-up sequence. If no external
reset is necessary, this input can be left open. If used (emergency reset), it has to
be driven by an open collector or an open drain.
at least 500us. The signal is considered an emergency reset only. A reset procedure
is already driven by internal hardware during the power-up sequence. If no external
reset is necessary, this input can be left open. If used (emergency reset), it has to
be driven by an open collector or an open drain.
26
GND GND
Logic Ground.
29
LED DCD
O
DCD (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): When lit, indicates a connection. No
series resistor.
SocketWireless Bluetooth (MTS2BTSMI): When lit, indicates a connection. No
series resistor.
30
LED RX
O
RX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
31
LED DTR
O
DTR (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
32
LED TX
O
TX (Active High). Output from 74LCX14 with a 1000 Ohms resistor in series.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
SocketWireless Bluetooth (MTS2BTSMI): No series resistor.
33
–RTS I
Request to Sent (Active Low). –RTS signal is used for hardware flow control. –RTS
input ON (low) indicates that the DTE is ready to send data to the modem. In the
command state, the modem ignores –RTS.
Note: When the –RTS pin is not in use, it should be tied low.
input ON (low) indicates that the DTE is ready to send data to the modem. In the
command state, the modem ignores –RTS.
Note: When the –RTS pin is not in use, it should be tied low.
34
–RXD O
Received Data. The module uses the RXD line to send data to the DTE and to send
module responses to the DTE. In command mode, –RXD data presents the module
responses to the DTE. Module responses take priority over incoming data when the
two signals are in competition for –RXD. When no data is transmitted, the signal is
held in mark condition.
module responses to the DTE. In command mode, –RXD data presents the module
responses to the DTE. Module responses take priority over incoming data when the
two signals are in competition for –RXD. When no data is transmitted, the signal is
held in mark condition.
35
–TXD I
Transmitted Data. The DTE uses the –TXD line to send data to the module for
transmission or to transmit commands to the module. The DTE holds this circuit in
mark state when no data is being transmitted or during intervals between characters.
transmission or to transmit commands to the module. The DTE holds this circuit in
mark state when no data is being transmitted or during intervals between characters.
36
–RI or
PIO5
PIO5
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.
SocketWireless
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.
SocketWireless
Bluetooth (MTS2BTSMI): PIO5 – User definable I/O pin PIO5.
Strobes 1/sec for slave indication.