Contec IPC-BX/M560, User Manual

Page: 58 / 90

Functions of Components
IPC-BX/M560(PCW)
47
Table 5.10. Register Functions
<3/4>
MCR: Modem Control Register
D7 D6 D5 D4 D3 D2 D1 D0
03FCH
I/O address Contents
DTR 0: Inactive [HIGH]
1: Active [LOW]
0 0 0 Loop IRQ X RTS DTR
RTS 0: Inactive [HIGH]
1: Active [LOW]
Interrupt control bit
0: Disable
1: Enable
Diagnostic local loopback test
0: Disable
1: Enable
LSR: Line Status Regester
03FDH
D7 D6 D5 D4 D3 D2 D1 D0
0
TEMT THRE
BI FE PE OE DR
Data ready
(1: Receive data present)
Overrun error (1:
Error occurred)
Parity error (1: Error occurred)
Framing error (1: Error occurred)
Break interrupt (1: Detects break status)
Transmitter holding register empty
(1: Transmission buffer empty)
Transmitter empty
(1: Both of the transmitter holding register and
transmitter shift register are empty.)