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CP321
4.3.8
Control Register
The Control register provides access to the front panel general purpose LED's (LED1R and
LED1G), allows for the generation of a software reset of the system, and is used to control the
configuration of the SER 0 (UART B) either for RS232 or RS485 operation.
Table 4-11:Control Register
REGISTER NAME
ADDRESS
BIT POSITION
CONTENT
RS_CTL
DEFAULT
BIT
NAME
0
LED1G
1
LED1R
2
3
4
S_RST
5
6
7
RS_CTL
ID 24977, Rev. 02
CONTROL
0xFFE0 001A
7
6
5
res.
res.
n/a
n/a
n/a
VAL
0
LED1G (green) off
1
LED1G (green) on
0
LED1R (red) off
1
LED1R (red) on
0
reserved
1
0
reserved
1
0
no operation
1
Causes a software reset (S_RST) to be initiated
0
reserved
1
0
reserved
1
Indicates that the serial interface, SER 0 (UART B), is to be configured for
0
RS232 operation
Indicates that the serial interface, SER 0 (UART B), is to be configured for
RS485 operation
Warning!
1
When setting bit 7 care must be taken to
ensure that the installed interface corre-
sponds to the bit setting. A mismatch
may cause damage to the CP321 or the
application.
© 2003 Kontron Modular Computers GmbH
4
3
2
S_RST
res.
res.
n/a
n/a
n/a
DESCRIPTION
Configuration
ACCESS
R
W
1
0
LED1R
LED1G
0
0
Page 4 - 13
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