Contec COM-2(PCI), User Manual

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I/O Ports and Registers
COM-2(PCI), COM-4(PCI), COM-8(PCI)
52
Register Address List for the 16552 and 16654
16552 : Used on the COM-2(PCI) and COM-4(PCI)
16654 : Used on the COM-8(PCI)
Table 5.2. Register Address List for the 16552 and 16654
(Short from Texas Instruments data book) < 1 / 2 >
0 DLAB = 0 0 DLAB = 0 1 DLAB = 0 2 2 3
Bit Receiver Transmitter Interrupt Interrupt FIFO Line
No. Buffer Holding Enable Ident. Control Control
Register Register Register Register Register Register
(Read Only) (Write Only) (Read Only) (Write Only)
RBR THR IER IIR FCR LCR
0 Data Bit 0 Data Bit 0 Enable "0" if FIFO Word
Received Interrupt Enable Length
Data Pending Select
Available Bit 0
Interrupt (WLS0)
(ERBFI)
1 Data Bit 1 Data Bit 1 Enable Interrupt RCVR Word
Transmitter ID FIFO Length
Holding Bit (0) Reset Select
Register Bit 1
Empty (WLS1)
Interrupt
(ETBEI)
2 Data Bit 2 Data Bit 2 Enable Interrupt XMIT Number of
Receiver ID FIFO Stop Bits
Line Status Bit (1) Reset (STB)
Interrupt
(ELSI)
3 Data Bit 3 Data Bit 3 Enable Interrupt DMA Parity
MODEM ID Mode Enable
Status Bit (2) Select (PEN)
Interrupt
(EDSSI)
4 Data Bit 4 Data Bit 4 Sleep Interrupt TX Even
Mode ID Trigger Parity
*2 Bit (3) (LSB) Select
*2 *2 (EPS)
5 Data Bit 5 Data Bit 5 Xoff Interrupt TX Stick
Interrupt ID Trigger Parity
*2 Bit (4) (MSB)
*2 *2
6 Data Bit 6 Data Bit 6 RTS FIFOs RCVR Set
Interrupt Enabled Trigger Break
*2 (LSB)
7 Data Bit 7 Data Bit 7 CTS FIFOs RCVR Divisor
Interrupt Enabled Trigger Latch
*2 (MSB) Access Bit
(DLAB)
*2 : Each bit is 0 fixations in 16552.
Register