W6694 Datasheet, PDF (25/33 Pages) Winbond – USB Bus ISDN S/T-Controller

Preliminary W6694
OMn_1-0
Output Mode of IO Pin n (n = 3...0).
Setting corresponding bits drive output pin with different output mode.
Possible modes are:
00: always LOW
01: 0.5 second HIGH/LOW cycle
10: 1 second HIGH/LOW cycle
11: always HIGH
These bits have no effect on input pin.
The default value of this register makes pin PIO0 flash if ISDN clock is enabled.
8.4.3 PIO Output Register 2
PO2
Read/Write Address 0Ch
Value after reset: FFh
7
6
5
OM7_1 OM7_0 OM6_1
4
OM6_0
3
OM5_1
2
OM5_0
1
OM4_1
0
OM4_0
OMn_1-0
Output Mode of IO Pin n (n = 7..4).
8.4.4 PIO Data Register
PDATA Read
Address 0Dh
Value after reset: 00h
7
6
5
4
3
2
1
0
D7
D6
D5
D4
D3
D2
D1
D0
D7-0 Read Data of IO Pins 7-0
The corresponding bits are the present values of IO pins 7-0 (LOW=0, HIGH=1).
8.5 B Channel Switch Registers
8.5.1 Layer1 B1 Receiver Select Register
L1B1RS
Read/Write Address 0Eh
Value after reset: 04h
7
6
5
4
3
2
1
0
0
0
0
0
0
RS2
RS1
RS0
RS2-0 Receiver Select
These bits select the source where layer 1 B1 channel will receive data from.
values are:
000 (0): receive from PCM1
001 (1): receive from PCM2
010 (2): receive from Layer1 B1
100 (4): receive from USB B1
Possible
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Publication Release Date: October 2000
Revision A1