Datasheet

STULPI01A, STULPI01B ULPI registers

Doc ID 14817 Rev 4 31/44

Note: 3Dh-3Fh(Read), 3Dh(Write), 3Eh(Set), 3Fh(Clear). These addresses control various power

aspects of the USB transceiver.

Table 15. Vendor and product ID

VENDOR_ID_LOW 7:0 rd 00h 83 h Lower byte of vendor ID.

VENDOR_ID_HIGH 7:0 rd 01h 04 h Upper byte of vendor ID.

PRODUCT_ID_LOW 7:0 rd 02h 4b h Lower byte of product ID number.

PRODUCT_ID_HIGH 7:0 rd 03h 4f h Upper byte of product ID number.

Table 16. Power control register

Field name Bits Access Reset Description

Reserved 0 rd/wr/s/c 0b Reserved. The link must never write a 1b to this bit.

Overcurrent_PD 1 rd/wr/s/c 1b

Power control of the internal overcurrent circuit.

0b: enables the overcurrent circuit.

1b: disables the overcurrent circuit.

UART_DIR 2 rd/wr/s/c 0b

0b: Txd on DM and Rxd on DP

1b: Txd on DP and Rxd on DM

UART_2V7 3 rd/wr/s/c 1b

0b: UART signaling at 3V3

1b: UART signaling at 2V7

Reserved 7:4 rd/wr/s/c 0b Reserved. The link must never write a 1b to these bits.