CD1865 Datasheet, PDF (114/150 Pages) Intel Corporation – Intelligent Eight-Channel Communications Controller

CD1865 — Intelligent Eight-Channel Communications Controller
Channel Option Register Change Command
Bit 7
0
Bit 6
COR CHNG
Bit 5
0
Bit 4
0
Bit 3
COR3
Bit 2
COR2
Bit 1
COR1
Bit 0
N/U
Changes made to some Channel Option register bits must be signalled to the CD1865 by this
command. Any combination of COR changes may be indicated by one command. All of the bits in
COR3 take effect immediately, and all of the bits in COR2 (except LLM) take effect immediately.
In other words, when changing COR3 or any of COR2 (except LLM), it is not necessary to issue a
Channel Option register Change Command. However, to preserve compatibility with older
CD1865 designs, it is acceptable to set these bits.
Bit
Bit 7
Bit 6
Bits 5:4
Bit 3
Bit 2
Bit 1
Bit 0
Description
Must be a ‘0’.
Channel Option Register Change Command, must be a ‘1’.
Must be a ‘0’.
Channel Option Register 3 changed (no longer required).
Channel Option Register 2 changed (required only for Local Loopback mode change).
Channel Option Register 1 changed.
Not used.
Send Special Character(s) Command
Bit 7
0
Bit 6
0
Bit 5
SEND SP CH
Bit 4
0
Bit 3
0
Bit 2
SSPC2
Bit 1
SSPC1
Bit 0
SSPC0
Bit
Bits 7:6
Must be a ‘0’.
Description
114
Datasheet