W6694CD WINBOND [Winbond], W6694CD Datasheet - Page 23

• Manufacturer Part Number: W6694CD
• Description: USB Bus ISDN S/T-Controller
• Manufacturer: WINBOND [Winbond]

TLP
GRLP GCI Mode Remote Loopback
SPU
PD
GE
8.3.2 Monitor Channel Control Register
Value after reset: 00h
MRIE
MRC
SPU
0
1
0
1
7
0
MR Bit Control
Test Loopback
When set this bit both the GCIDU and GCIDD lines are internally connected together. The
GCI mode loopback test function: GCIDU is internally connected with GCIDD, external input
on GCIDD is ignored.
Setting this bit to 1 activates the remote loopback function. The 2B+D channels data received
from the GCI bus interface are looped to the transmitted channels.
Software Power Up
Power Down
GCI Mode Enable
Setting this bit to 1 will enable the GCI bus interface. In the same time, the S/T layer 1
function is disabled.
Monitor channel interrupt status MDR, MER generation is enabled (1) or masked (0).
Determines the value of the MR bit:
Monitor Channel 0 Receive Interrupt Enable
PD
1
0
0
1
0
6
After U transceiver power down, W6694 will receive the indication DC
(Deactivation Confirmation) from GCI bus and then software has to set SPU
PD
remains normal operation.
Setting SPU
enforce connected layer 1 devices (U transceiver) to deliver GCI bus clocking.
After reception of the indication PU (Power Up indication) the reaction of the
microprocessor should be:
- To write an AR (Activate Request command) as C/I command code in the CIX
register.
- To reset the SPU bit and wait for the following ICC (indication code change)
interrupt.
Unused.
1 to acknowledge U transceiver, by pulling GCIDU line to HIGH. W6694
5
0
1, PD
4
0
0 will pull the GCI bus GCIDU line to LOW. This will
MRIE
3
- 23 -
DESCRIPTION
MRC
MOCR Read/Write
2
Publication Release Date: October 2000
MXIE
1
Preliminary W6694
MXC
0
Address 07h
Revision A1
0,