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TUSB8041 Datasheet(PDF) 7 Page - Texas Instruments |
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TUSB8041 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 48 page TUSB8041 www.ti.com SLLSEE4D – JUNE 2014 – REVISED JANUARY 2016 Pin Functions (continued) PIN I/O DESCRIPTION NAME NO. USB Port 4 Over-Current Detection. This pin is used to connect the over current output of the downstream port power switch for Port 4. 0 = An over current event has occurred OVERCUR4z 43 I, PU 1 = An over current event has not occurred This pin can be left unconnected if power management is not implemented. If power management is enabled, the external circuitry needed should be determined by the power switch. I2C/SMBUS Signals I2C clock/SMBus clock. Function of pin depends on the setting of the SMBUSz input. When SMBUSz = 1, this pin acts as the serial clock interface for an I2C EEPROM. SCL/SMBCLK 38 I/O, PD When SMBUSz = 0, this pin acts as the serial clock interface for an SMBus host. Can be left unconnected if external interface not implemented. I2C data/SMBus data. Function of pin depends on the setting of the SMBUSz input. When SMBUSz = 1, this pin acts as the serial data interface for an I2C EEPROM. SDA/SMBDAT 37 I/O, PD When SMBUSz = 0, this pin acts as the serial data interface for an SMBus host. Can be left unconnected if external interface not implemented. I2C/SMBus mode select/SuperSpeed USB Suspend Status. The value of the pin is sampled at the de-assertion of reset set I2C or SMBus mode as follows: 1 = I2C Mode Selected 0 = SMBus Mode Selected SMBUSz/SS_SUSPEND 39 I/O, PU Can be left unconnected if external interface not implemented. After reset, this signal indicates the SuperSpeed USB Suspend status of the upstream port if enabled through the Additional Feature Configuration register. When enabled a value of 1 indicates the connection is suspended. Test and Miscellaneous Signals Full power management enable/SMBus address bit 1/SuperSpeed USB Connection Status Upstream port. The value of the pin is sampled at the de-assertion of reset to set the power switch control follows: 0 = Power switching and over current inputs supported 1 = Power switching and over current inputs not supported Full power management is the ability to control power to the downstream ports of the FULLPWRMGMTz/ 40 I/O, PD TUSB8041 using PWRCTL[4:1]/BATEN[4:1]. SMBA1/SS_UP When SMBus mode is enabled using SMBUSz, this pin sets the value of the SMBus slave address bit 1. Can be left unconnected if full power management and SMBus are not implemented. After reset, this signal indicates the SuperSpeed USB connection status of the upstream port if enabled through the Additional Feature Configuration register. When enabled a value of 1 indicates the upstream port is connected to a SuperSpeed USB capable port. Note: Power switching must be supported for battery charging applications. Power Control Polarity. The value of the pin is sampled at the de-assertion of reset to set the polarity of PWRCTL[4:1]. PWRCTL_POL 41 I/O, PU 0 = PWRCTL polarity is active low 1 = PWRCTL polarity is active high Copyright © 2014–2016, Texas Instruments Incorporated Submit Documentation Feedback 7 |
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