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For RS232 serial without DTR Shutdown link 2-3
For RS232 serial with DTR Shutdown link 1-2
For 5V TTL serial link 4-5
Note: the –5V generator for the RS232 interface is turned off if 5VTTL is selected, and also
while DTR is inactive if the DTR shutdown link option is enabled. The latter option is
complemented by the software DTR shutdown option which causes the processor to shut
down all the radio circuits while DTR is inactive. For lowest current consumption both
options must be enabled.
3.8
SERIAL PORT PIN CONNECTIONS
The ART400 is equipped with a 9 way D connector for all serial port connections, the pins of
this connector are allocated as follows:
Pin No. Description
1.
DCD: Data Carrier Detect
2.
RXD: Receive Data
3.
TXD: Transmit Data
4.
DTR: Data Terminal Ready
5. GND:
GROUND
6.
DSR: Data set ready
7.
RTS: Request to send
8.
CTS: Clear to send
9. RI:
Ring
Indicate
