Javad LMR400, Руководство пользователя

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PIN # Signal Desig-
nator
Signal
name
Description I/O Comments
1 GND GND Ground - Signal and Chassis Ground
2 DSP UART 1 TXD
Transmitted
Data
TTL Input Serial Data Input
3 DSP UART 2 RXD Received Data TTL Out-
put
Output for received serial data
4 DPORT5
DTR or DP/
MP
Data Terminal
Ready
TTL Input
Control line can be used as a backup method for entering
Command mode:(0V) – Maintenance Mode; (3.3V) – Data
Mode
An internal 100K pull-up enables Data Mode if this signal is left
unconnected. Maintenance Mode is also accessible by trans-
mitting an escape sequence.
5 DPORT1 CTS Clear to Send TTL Out-
put
Used to control transmit flow from the user to the radio: (0V)
– Transmit buffer not full, continue transmitting (3.3V) – Trans-
mit buffer full, stop transmitting
6 TTLI1 SLEEP
Sleeps/wakes
radio Receive
only
TTL Input
In sleep mode, all radio functions are disabled consuming
less than 50µA. An internal 10K pull-down wakes up the
radio if this signal is left unconnected. At wake up, any user
programmed configuration settings are refreshed from flash
memory, clearing any temporary settings that may have been
set:(3.3V) – Sleep Radio; (0V) – Wake Radio. As an option could
be used as TTL Input Line 1.
7 DPORT3 MDM_GRN
Data Carrier
Detect
TTL Out-
put
Used by remotes to indicate that the remote has successfully
acquired the signal from base station:
(0V) 1 – Carrier detected (synchronized)(3.3V) 0 – No carrier
detected (not synchronized)
8 DPORT4 RTS
Request to
Send
TTL Input
Gates the flow of receive data from the radio to the user on or
off. An internal 10K pull-down enables data receive if this sig-
nal is left unconnected. In normal operation, this signal should
be asserted:(0V) – Receive data (RxD) enabled (3.3V) – Receive
data (RxD) disabled
9 DPORT2 DSR
Data Set
Ready
TTL Out-
put
Used to control transmit flow from the user to the radio:(0V)
1 – Receive buffer has data to transfer; (3.3V) 0 – Receive buffer
is empty
10 RES CONT RESCONT
Reset the
radio
TTL Input Reset the radio by shortening this pin to the ground.
11 TTLO1 TTLOUT1
TTL Output
Line 1
TTL Out-
put
Reserve line
12 TTLO2 TTLOUT2
TTL Output
Line 2
TTL Out-
put
Reserve line
13 GND GND Ground - Signal and Chassis Ground
14 TTLI2 TTLIN TTL Input line TTL Input An internal 100K pull-up resistor is applied.
15 VCC36 PWR Power Supply External Regulated positive 4.2V DC from ext. Power Supply.
16 VCC36 PWR Power Supply External Regulated positive 4.2V DC from ext. Power Supply.
16-LEAD HEADER CONNECTOR PINOUT