CD2401 Intel, CD2401 Datasheet - Page 108
CD2401
Manufacturer Part Number
CD2401
Description
Multi-protocol Communications Controller
Manufacturer
Intel
Datasheet
1.CD2401.pdf
(176 pages)
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CD2401 — Multi-Protocol Communications Controller
8.2.8
108
Register Name: COR6
Register Description: Channel Option 6
Default Value: x’00
Access: Byte Read/Write
Register Name: COR7
Register Description: Channel Option 7
Default Value: x’00
Access: Byte Read/Write
IStrip
Bit 7
Bit 7
Note: This feature is not available in revisions prior to Revision ‘H’.
COR6 — X.21 Mode
In X.21 mode, this register contains the character to be used for find character synchronization with
the receive datastream. When the initialize channel command in the CCR is processed, COR6 is set
to the value ASCII SYN (hex 16). If the user requires a different synchronization character, COR6
can be loaded with that character after the initialize channel command completes, as in the
following sequence:
Channel Option Register 7 (COR7) — Async Mode only
CR is defined as 0D hex, NL as 0A hex, and NULL as 00 hex.
Bit 7
Bit 6
1. Issue initialize channel command.
2. Wait for command to complete (CCR returns to hex 00).
3. Reprogram COR6 to the desired character.
4. Issue receive enable command by CCR.
Bit 6
Bit 6
LNE
I-Strip
When this bit is set, the most-significant bit of receive characters is stripped, leaving
7-bit characters. IStrip is applied before special character processing, but after all
other character processing.
LNext Enable
This bit enables the LNext option.
0 = all receive characters are processed for special character detection.
1 = the character following the LNext character is not processed for special character
matching or flow control.
FCErr
Bit 5
Bit 5
Bit 4
Bit 4
0
SYN Character
Bit 3
Bit 3
0
Bit 2
Bit 2
0
Motorola Hex Address: x’18
Motorola Hex Address: x’07
ONLCR
Bit 1
Bit 1
Intel Hex Address: x’1B
Intel Hex Address: x’04
Datasheet
OCRNL
Bit 0
Bit 0
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