User Manual

Appendix C Hayes AT Command Reference
RFI-9256 Radio Modem User Manual Page 85 of 96
 ATS82=80<CR> : This would set I/O 7 to logic high, and all other I/Os to logic low on power-up.
C.2.26 “ATS84” Set Auxiliary I/O Sample Timer
S-register 84 sets the sample period for the input I/Os.
 ATS84=100<CR> : This would cause the I/Os to be sampled once every 100ms.
C.2.27 “ATS90” Set DCD control
S-register 90 sets how the data carrier detect (DCD) output is controlled. The options for controlling DCD
are shown in Table 30.
Value Description
0 Online controls DCD.
1 Network link controls DCD.
2 Carrier detect controls DCD.
3 Remote DTR controls DCD.
4 Local DTR controls DCD.
5 Remote RTS controls DCD.
6 Local RTS controls DCD.
7 DCD always off.
8 DCD always on.
9 DCD disabled.
Table 34: DCD output control options
 ATS90=2<CR> : Sets carrier detect to control DCD.
 ATS90=7<CR> : Sets DCD to always be on.
C.2.28 “ATS91” Set CTS control
S-register 90 sets how the clear to send (CTS) output is controlled. The options for controlling CTS are
shown in Table 31.
Value Description
0 Online controls CTS.
1 Network link controls CTS.
2 Carrier detect controls CTS.