Contec IPC Series User Manual page 82

Table 6.3. Function of Each Register < 3 / 4 >
I/O address
03FCH
MCR: Modem Control Register
D7
0
03FDH
LSR: Line Status Regester
D7
0
PT-956SxX Series User's manual
D6 D5 D4 D3
0 0 Loop IRQ
Diagnostic local loop-back test
0 : Disable
1 : Enable
D6 D5 D4 D3
BI FE
TEMT THRE
Break interrupt (1 for detection of break state)
Transmitter holding register empty
(1 for transmission buffer being empty)
Transmitter empty
(Set to 1 when both transmitter holding register and
transmitter shift register are empty.)
Description
D2 D1 D0
X RTS DTR
DTR
RTS 0 : Inactive
[HIGH]
1 : Active
[LOW]
Interrupt control bit
0 : Disable
1 : Enable
D2 D1 D0
PE OE DR
Data ready
(1 for existence of received data)
Overrun error
(1 for occurrence of an error)
Parity error (1 for occurrence of an error)
Framing error (1 for occurrence of an error)
6. Appendix
0 : Inactive
[HIGH]
1 : Active
[LOW]
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