w6691 Winbond Electronics Corp America, w6691 Datasheet - Page 83
w6691
Manufacturer Part Number
w6691
Description
Isdn S/t Interface Transceiver
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W6691.pdf
(106 pages)
- Current page: 83 of 106
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8.9.5 SFCTL Switch Functional Control Register Read/Write
Value after reset : 00H
PGSWH
Determines the CODEC interface is to be operated in B channel.
1: PCM bus is selected to operate with CODEC.
0: GCI bus is selected to operate with CODEC.
PCRLP PCM Remote Loop Back
Setting this bit activates the PCM channel remote loopback function. The transmitted PCM data to PCM
channel are looped to received PCM channel.
PXC
This bit determines whether or not the PCM ports are cross-connected with the B channel ports. The setting of
PXC is independent of the BSW1-0 bits.
B2SW1 / B2SW0 B2 channel Switch
These two bits determine B2 channel switch among PCM port , GCI and Layer2.
00: Select B2 channel switch between Layer2 and Layer1/GCI.
01: Select B2 channel switch between Layer1/GCI and PCM.
10: Select B2 channel switch between PCM and Layer2.
7
0
PCM Cross-connect
PXC
PCM and GCI bus Switch
PGSWH
0
1
6
PCM1
PCM1
PCRLP
5
B1, PCM2
B2, PCM2
Connection
PXC
4
B2
B1
B2SW1
83
3
B2SW0
2
Address 3CH
Preliminary W6691
B1SW1
Publication Release Date: Sep 2001
1
B1SW0
0
Revision 1.1
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