W6692 Datasheet, PDF (69/104 Pages) Winbond – PCI Bus ISDN S/T-Controller

Preliminary Data Sheet
W6692 PCI ISDN S/T-Controller
GRLP
GCI Mode Remote Loop-back
Setting this bit to 1 activates the remote loop-back function. The 2B+D channels data received from the GCI bus
interface are looped to the transmitted channels.
SPU Software Power Up
PD
Power Down
SPU PD
Description
0
1 After U transceiver power down, W6692 will receive the indication DC (Deactivation Confirmation) from
GCI bus and then software has to set SPU → 0, PD →1 to enter Power Down state.
1
0 Setting SPU → 1, PD →0 will pull the GCI bus DOUT line to low. This will enforce connected layer 1
devices (U transceiver) to deliver GCI bus clocking.
0
0 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.
1
1 Unused.
GMODE GCI Mode
.
0: Layer 1 is S/T interface; GCI is in master mode. This is default setting.
1: Layer 1 is U interface; GCI is in slave mode.
8.1.33 Peripheral Address Register
XADDR
Value after reset: Undefined
The register content depends on PCTL:XMODE setting.
XMODE = 0 : Simple IO mode
7
6
5
4
3
2
IO7
IO6
IO5
IO4
IO3
IO2
Read/Write
1
0
IO1
IO0
IO1-0 Read or Write Data of Pins IO1-0
On read operation, these are the present values of pins IO1-0.
On write operation, the data are driven to pins IO1-0 only if PCTL:OE0=1.
IO3-2 Read or Write Data of Pins IO3-2
On read operation, these are the present values of pins IO3-2.
Address F4H/3DH
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Publication Release Date: Sep 30, 1999
Revision 0.9