Appendix C Hayes AT Command Reference
RFI-9256 Radio Modem User Manual
Page 96 of 109
C.2.23
“ATS83” Set Auxiliary I/O Power-up Default
S-register 83 contains the power-up default value for the auxiliary I/O port. A bit set to 1 sets the I/O as logic
high, and 0 sets the I/O as logic low.
ATS83=FF<CR>
: This would set all eight I/Os to logic high on power-up.
ATS82=80<CR>
: This would set I/O 7 to logic high, and all other I/Os to logic low on power-up.
C.2.24
“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.2.25
“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 29.
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 33: DCD output control options
ATS90=2<CR>
: Sets carrier detect to control DCD.
ATS90=7<CR>
: Sets DCD to always be on.
C.2.26
“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 30.
