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5-22 Lucent Technologies Inc.
USS-720
Instant USB
Preliminary Data Sheet, Rev. 5
USB-to-
IEEE
1284 Bridge September 1999
13
IEEE
1284 Port (continued)
USS-720 Setup Register
Table 29. USS-720 Setup Register
USS-720 Setup Register Address: 8
Bit 765432 1 0
Symbol Reserved Reserved Reserved Reserved Reserved Reserved Filter Software
Override
Filter
Enable
Access R/W R/W R/W R/W R/W R/W R/W R/W
Default 000000 0 1
Bit Symbol Bit Description
7 Reserved Reserved.
6 Reserved Reserved.
5 Reserved Reserved.
4 Reserved Reserved.
3 Reserved Reserved.
2 Reserved Reserved.
1 Filter Software Override Filter Software Override. When this bit is set, software can control the
digital filtering of incoming parallel port signals with the Filter Enable bit.
When clear, filters are controlled by the pull-up or pull-down stage of the
SUSPEND pin. (See Filter Bypass Mode.)
0 Filter Enable Filter Enable. Controls digital filtering of incoming parallel port signals
when the Filter Software override bit is set. Setting to 1 enables filtering;
clearing this bit disables filtering.