Contec COM-2(PCI), User Manual

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I/O Ports and Registers
COM-2(PCI), COM-4(PCI), COM-8(PCI)
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Table 5.2. Register Address List for the 16552 and 16654
(Short from Texas Instruments data book) < 2 / 2 >
4 5 6 7 0 DLAB = 1 1 DLAB =1
Bit MODEM Line MODEM Scratch Divisor Divisor
No. Control Status Status Register Latch Latch
Register Register Register (LS) (MS)
MCR LSR MSR SCR DLL DLM
0 Data Data Delta Bit 0 Bit 0 Bit 8
Terminal Ready Clear
Ready (DR) to Send
(DTR) (DCTS)
1 Request Overrun Delta Bit 1 Bit 1 Bit 9
to Send Error Data
(RTS) (OE) Set Ready
(DDSR)
2 Out 1 Parity Trailing Bit 2 Bit 2 Bit 10
Error Edge Ring
0: INT Enable (PE) Indicator
1: INT Disable (TERI)
*1
3 0 Framing Delta Bit 3 Bit 3 Bit 11
Error Data
(FE) Carrier Detect
(DDCD)
4 Loop Break Clear Bit 4 Bit 4 Bit 12
Interrupt to Send
(BI) (CTS)
5 Xon Transmitter Data Bit 5 Bit 5 Bit 13
Any Holding Set
*2 Register Ready
(THRE) (DSR)
6 IR Transmitter Ring Bit 6 Bit 6 Bit 14
Enable Empty Indicator
*2 (TEMT) (RI)
7 0 Error in Data Bit 7 Bit 7 Bit 15
FIFO Carrier
Detect
*1 : See " Using Interrupts ".
*2 : Each bit is 0 fixations in 16552.
Register