TUSB8020BPHPR datasheet(10/44 Pages) TI

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TUSB8020B

SLLSEF6C – JULY 2014 – REVISED JUNE 2017

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Feature Description (continued)

The battery charging mode for each port depends on the state of Reg_6h(batEn[n]), the status of the VBUS

input, and the state of REG_Ah(autoModeEnz) upstream port, as identified in Table 1. Battery charging can also

be enabled through the PWRCTL1/BATEN1 and PWRCTL2/BATEN2 pins.

(1)

Auto-mode automatically selects divider-mode or DCP mode.

(2)

Divider mode can be configured for high-current mode through register or OTP settings.

(3)

USB device is USB Battery Charging Specification Revision 1.2 Compliant

(4)

USB device is Chinese Telecommunications Industry Standard YD/T 1591-2009

Table 1. TUSB8020B Battery Charging Modes

batEn[n]

VBUS

autoModeEnz

BC Mode Port x

(x = n + 1)

Don’t care

<4 V

Automode(1) (2)

DCP(3) (4)

>4 V

CDP(3)

8.3.2 USB Power Management

The TUSB8020B can be configured for power switched applications using either per-port or ganged power-

enable controls and over-current status inputs.

Power switch support is enabled by REG_5h(fullPwrMgmtz) and the per-port or ganged mode is configured by

REG_5h(ganged). It can also be enabled through the FULLPWRMGMTz pin. Also ganged or individual control

can be controlled by the GANGED pin.

The TUSB8020B supports both active-high and active-low power-enable controls. The PWRCTL[2:1] polarity is

configured by REG_Ah(pwrctlPol). The polarity can also be configured by the PWRCTL_POL pin.

8.3.3 One-Time Programmable (OTP) Configuration

The TUSB8020B allows device configuration through OTP non-volatile memory (OTP). The programming of the

OTP is supported using vendor-defined USB device requests. For details using the OTP features, contact your TI

representative.

Table 2 provides a list features which may be configured using the OTP. The bit field section in Table 2 shows

which features can be controlled by OTP ROM. The bits not listed in the table are not accessible by the OTP

ROM.

Table 2. OTP Configurable Features

CONFIGURATION REGISTER OFFSET

BIT FIELD

DESCRIPTION

REG_01h

[7:0]

Vendor ID LSB

REG_02h

[7:0]

Vendor ID MSB

REG_03h

[7:0]

Product ID LSB

REG_04h

[7:0]

Product ID MSB

REG_07h

[0]

Port removable configuration for downstream ports 1. OTP configuration is

inverse of rmbl[1:0], that is:

1 = Not removable

0 = Removable

REG_07h

[1]

Port removable configuration for downstream ports 2. OTP configuration is

inverse of rmbl[1:0], that is:

1 = Not removable

0 = Removable

REG_0Ah

[1]

Automode enable

REG_0Ah

[4]

High-current divider mode enable.

REG_F2h

[3:1]

USB power switch power-on delay.

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