STULPI01A_08 Datasheet, PDF (38/44 Pages) STMicroelectronics – High speed USB On-The-Go ULPI transceiver

ULPI registers
STULPI01A - STULPI01B
Table 25.
Debug register
Address: 15h (Read-only)
(Indicates the current value of various signals useful for debugging)
Field name
Bits Access Reset
Description
LineState0
0
rd
0b Contains the current value of LineState(0)
LineState1
1
rd
0b Contains the current value of LineState(1)
Reserved
7:2
rd
0b Reserved
Table 26. Scratch register
Address: 16h-18h (Read), 16h (Write), 17h (Set), 18h (Clear).
Field name
Bits Access Reset
Description
Scratch
Empty register byte for testing purposes. The software can read,
7:0 rd/wr/s/c 00b write, set, and clear this register and the STULPI01 functionality
will not be affected.
Table 27. Carkit control register
Address: 19h-1Bh (Read), 19h (Write), 1Ah (Set), 1Bh (Clear).
Field name
Bits Access Reset
Description
reserved
0
rd/wr/s/c
0b
reserved
1
rd/wr/s/c
0b
TxdEn
2
rd/wr/s/c
0b Enables TXD signal in car kit mode
RxdEn
3
rd/wr/s/c
0b Enables RXD signal in car kit mode
reserved
4
rd/wr/s/c
0b
reserved
5
rd/wr/s/c
0b
reserved
6
rd/wr/s/c
0b
reserved
7
rd/wr/s/c
0b
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