TUSB3200CPAH datasheet(67/93 Pages) TI

67 / 93 page

A–19

A.5.1.3 USB Interrupt Mask Register (USBMSK – Address FFFDh)

The USB interrupt mask register contains the interrupt mask bits used to enable or disable the generation of interrupts

based on the corresponding status bits.

Bit

Mnemonic

RSTR

SUSR

RESR

SOF

PSOF

SETUP

—

STPOW

Type

R/W

Default

BIT

MNEMONIC

NAME

DESCRIPTION

RSTR

Function reset

The function reset interrupt mask bit is set to a 1 by the MCU to enable the USB

function reset interrupt.

SUSR

Function suspend

The function suspend interrupt mask bit is set to a 1 by the MCU to enable the USB

function suspend interrupt.

RESR

Function resume

The function resume interrupt mask bit is set to a 1 by the MCU to enable the USB

function resume interrupt.

SOF

Start-of-frame

The start-of-frame interrupt mask bit is set to a 1 by the MCU to enable the USB

start-of-frame interrupt.

PSOF

Pseudo start-of-frame

The pseudo start-of-frame interrupt mask bit is set to a 1 by the MCU to enable the

USB pseudo start-of-frame interrupt.

SETUP

Setup stage transaction

The setup stage transaction interrupt mask bit is set to a 1 by the MCU to enable the

USB setup stage transaction interrupt.

—

Reserved

Reserved for future use

STPOW

Setup stage transaction over-

write

The setup stage transaction over-write interrupt mask bit is set to a 1 by the MCU to

enable the USB setup stage transaction over-write interrupt.

A.5.1.4 USB Control Register (USBCTL – Address FFFCh)

The USB control register contains various control bits used for USB operations.

Bit

Mnemonic

CONT

FEN

RWUP

FRSTE

—

Type

R/W

Default

BIT

MNEMONIC

NAME

DESCRIPTION

CONT

Function connect

The function connect bit is set to a 1 by the MCU to connect the TUSB3200 device to

the USB. As a result of connecting to the USB, the host PC should enumerate the

function. When this bit is set, the USB data plus pullup resistor (PUR) output signal is

enabled, which will connect the pullup on the PCB to the TUSB3200 3.3-V supply

voltage. When this bit is cleared to a 0, the PUR output is in the 3-state mode. This bit

is not affected by a USB reset.

FEN

Function enable

The function enable bit is set to a 1 by the MCU to enable the TUSB3200 device to

respond to USB transactions. If this bit is cleared to a 0, the UBM will ignore all USB

transactions. This bit is cleared by a USB reset.

RWUP

Remote wake-up

The remote wake-up bit is set to a 1 by the MCU to request the suspend/resume

logic to generate resume signaling upstream on the USB. This bit is used to exit a

USB low-power suspend state when a remote wake-up event occurs. After initiating

the resume signaling by setting this bit, the MCU should clear this bit within 2.5

µs.

FRSTE

Function reset enable

The function reset enable bit is set to a 1 by the MCU to enable the USB reset to reset

all internal logic including the MCU. However, the shadow the ROM (SDW) and the

USB function connect (CONT) bits will not be reset. When this bit is set, the reset

output (RSTO) signal from the TUSB3200 device will also be active when a USB

reset occurs. This bit is not affected by USB reset.

3:0

—

Reserved

Reserved for future use

TUSB3200CPAH 数据表(PDF) 67 Page - Texas Instruments

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