TUSB5052 datasheet(33/84 Pages) TI

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5–1

5 USB Registers

5.1

FUNADR: Function Address Register

This register contains the device function address.

RSV

FA6

FA5

FA4

FA3

FA2

FA1

FA0

R/O

R/W

BIT

NAME

RESET

FUNCTION

6–0

FA[6:0]

These bits define the current device address assigned to the function. The MCU writes a value to this register as

a result of the

SET-ADDRESS host command.

RSV

Reserved = 0

5.2

USBSTA: USB Status Register

All bits in this register are set by the hardware and are cleared by the MCU when writing a 1 to the proper bit location

(writing a 0 has no effect). In addition, each bit can generate an interrupt if its corresponding mask bit is set (R/C

notation indicates read and clear only by the MCU).

RSTR

SUSR

RESR

UR2RI

UR1RI

SETUP

WAKEUP

STPOW

R/C

BIT

NAME

RESET

FUNCTION

STPOW

SETUP overwrite bit. Set by hardware when setup packet is received while there is already a packet in the setup

buffer.

STPOW = 0

MCU can clear this bit by writing a 1 (Writing 0 has no effect).

STPOW = 1

SETUP overwrite

WAKEUP

Remote wake-up bit

WAKEUP = 0 The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

WAKEUP = 1 Remote wake-up request from WAKEUP pin

SETUP

SETUP transaction received bit. As long as SETUP is 1, IN and OUT on endpoint-0 will be NAKed, regardless of

their real NAK bits value.

SETUP = 0

MCU can clear this bit by writing a 1 (Writing 0 has no effect).

SETUP = 1

SETUP transaction received

UR1RI

UART1 RI status bit

UR1RI = 0

The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

UR1RI = 1

Ring detected

UR2RI

UART1 RI status bit

UR2RI = 0

The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

UR2RI = 1

Ring detected

RESR

Function resume request bit

RESR = 0

The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

RESR = 1

Function resume is detected.

SUSR

Function suspended request bit. This bit is set in response to a global or selective suspend condition.

FSUSP = 0

The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

FSUSP = 1

Function suspend is detected.

RSTR

Function reset request bit. This bit is set in response to host initiating a port reset. This bit will not be affected by

USB function reset.

FRST = 0

The MCU can clear this bit by writing a 1 (Writing 0 has no effect).

FRST = 1

Function reset is detected.

TUSB5052 数据表(PDF) 33 Page - Texas Instruments

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