CD1284 Datasheet, PDF (126/176 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
Bit
Description
Flow Control Transparency: This bit enables/disables the transparent response to flow control characters
5
received by the CD1284. If set, received XON and XOFF characters are not placed in the FIFO for the host. If
in-band flow control is enabled, the characters are acted upon. If this bit is not set, flow control characters are
acted upon, placed in the receive FIFO, and the host is notified by a receive exception service request.
Enable Special Character Detect on SCHR2 and SCHR1: This bit controls whether or not the CD1284
4
compares received characters with the values stored in SCHR2 and SCHR1. ‘1’ enables compare. This bit
must be set to enable automatic in-band flow control.
Serial Receive FIFO Threshold
RxTh3 RxTh2 RxTh1 RxTh0
Receiver FIFO Threshold
0
0
0
0
Not used.
3:0
0
0
0
1
1 character
0
0
1
0
2 characters
•
•
•
•
1
0
1
1
11 characters
7.4.4
Channel Option Register 4
Register Name: COR4
Register Description: Channel Option Register 4
Access: Read/Write
Bit 7
Bit 6
Bit 5
Bit 4
IGNCR
ICRNL
INLCR
IGNBRK
Bit 3
−BRKINT
Bit 2
PEH[2]
8-Bit Hex Address: 1E
Default Value: 00
Bit 1
PEH[1]
Bit 0
PEH[0]
126
Datasheet