JAJSHM8 June 2019 TUSB8042A
PRODUCTION DATA.
Bit No. | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Reset State | 0 | 0 | X | 0 | 0 | 0 | 0 | 0 |
Bit | Field | Type | Description |
---|---|---|---|
7 | Reserved | RO | Reserved. Read-only, returns 0 when read. |
6 | customBCfeatures | RW | Custom Battery Charging Feature Enable. This bit controls the ability to write to the battery charging feature configuration controls.
0 = The HiCurAcpModeEn is read only and the values are loaded from the OTP ROM. 1 = The HiCurAcpModeEn bit is read/write and can be loaded by EEPROM or written by SMBus. This bit may be written simultaneously with HiCurAcpModeEn. |
5 | pwrctlPol | RW | Power enable polarity. This bit is loaded at the de-assertion of reset with the value of the PWRCTL_POL pin.
0 = PWRCTL polarity is active low 1 = PWRCTL polarity is active high When the TUSB8042A is in I2C mode, the TUSB8042A loads this bit from the contents of the EEPROM. When the TUSB8042A is in SMBUS mode, the value may be over-written by an SMBus host. |
4 | HiCurAcpModeEn | RO/RW | High-current ACP mode enable. This bit enables the high-current tablet charging mode when the automatic battery charging mode is enabled for downstream ports.
0 = High current divider mode disabled . High current is ACP2(default) 1 = High current divider mode enabled. High current mode is ACP3 This bit is read only unless the customBCfeatures bit is set to 1. If customBCfeatures is 0, the value of this bit reflects the value of the OTP ROM HiCurAcpModeEn bit. |
3:2 | Reserved | RW | Reserved. These registers are unused and returns whatever value was written. |
1 | autoModeEnz | RW | 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 is supported on all ports that are enabled for battery charging support regardless of the value of this bit. |
0 | RSVD | RO | Reserved. Read only, returns 0 when read. |