TUSB8041RGCT datasheet(23/49 Pages) TI2

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TUSB8041

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SLLSEE4E – JUNE 2014 – REVISED JUNE 2016

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Table 23. Bit Descriptions – Device Configuration Register 2 (continued)

autoModeEnz

Automatic Mode Enable. This bit is loaded at the de-assertion of reset

with the value of the AUTOENz/HS_SUSPEND pin.

The automatic mode only applies to downstream ports with battery

charging enabled when the upstream port is not connected. Under these

conditions:

0 = Automatic mode battery charging features are enabled.

1 = Automatic mode is disabled; only Battery Charging DCP and

CDP mode is supported.

NOTE: When the upstream port is connected, Battery Charging CDP

mode will be supported on all ports that enabled for battery charging

support regardless of the value of this bit with the exception of Port 1.

CDP on Port 1 is not supported when Automatic Mode is enabled.

RSVD

Reserved. Read only, returns 0 when read.

8.5.12 USB 2.0 Port Polarity Control Register

Table 24. Register Offset Bh

Bit No.

Reset State

Table 25. Bit Descriptions – USB 2.0 Port Polarity Control Register

Bit

Field Name

Access

Description

customPolarity

Custom USB 2.0 Polarity. This bit controls the ability to write the

p[4:0]_usb2pol bits.

0 = The p[4:0]_usb2pol bits are read only and the values are loaded

from the OTP ROM.

1 = The p[4:0]_usb2pol bits are read/write and can be loaded by

EEPROM or written by SMBus. from this register

This bit may be written simultaneously with the p[4:0]_usb2pol bits

6:5

RSVD

Reserved. Read only, returns 0 when read.

p4_usb2pol

RO/RW

Downstream Port 4 DM/DP Polarity. This controls the polarity of the port.

0 = USB 2.0 port polarity is as documented by the pin out

1 = USB 2.0 port polarity is swapped from that documented in the

pin out, i.e. DM becomes DP, and DP becomes DM.

This bit is read only unless the customPolarity bit is set to 1. If

customPolarity is 0 the value of this bit reflects the value of the OTP

ROM p4_usb2pol bit.

p3_usb2pol

RO/RW

Downstream Port 3 DM/DP Polarity. This controls the polarity of the port.

0 = USB 2.0 port polarity is as documented by the pin out

1 = USB 2.0 port polarity is swapped from that documented in the

pin out, i.e. DM becomes DP, and DP becomes DM.

This bit is read only unless the customPolarity bit is set to 1. If

customPolarity is 0 the value of this bit reflects the value of the OTP

ROM p3_usb2pol bit.

p2_usb2pol

RO/RW

Downstream Port 2 DM/DP Polarity. This controls the polarity of the port.

0 = USB 2.0 port polarity is as documented by the pin out

1 = USB 2.0 port polarity is swapped from that documented in the

pin out, i.e. DM becomes DP, and DP becomes DM.

This bit is read only unless the customPolarity bit is set to 1. If

customPolarity is 0 the value of this bit reflects the value of the OTP

ROM p2_usb2pol bit.

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