Datasheet
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2.6.2 USBSTA: USB Status Register
TUSB3210
Universal Serial Bus
General-Purpose Device Controller
SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007
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).
7 6 5 4 3 2 1 0
RSTR SUSR RESR PWOFF PWON SETUP RSV STPOW
R/C R/C R/C R/C R/C R/C R/O R/C
BIT NAME RESET FUNCTION
0 STPOW 0 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
1 RSV 0 Reserved
2 SETUP 0 SETUP transaction received bit. As long as SETUP is 1, IN and OUT on endpoint-0 are NAK regardless
of the value of their real NAK bits.
SETUP = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
SETUP = 1 SETUP transaction has been received.
3 PWON 0 Power-on request for port 3.This bit indicates if power on to port 3 has been received. This bit generates
a PWON interrupt (if enabled).
PWON = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
PWON = 1 Power on to port 3 has been received.
4 PWOFF 0 Power-off request for port 3. This bit indicates whether power off to port 3 has been received. This bit
generates a PWOFF interrupt (if enabled).
PWOFF = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
PWOFF = 1 Power off to port 3 has been received.
5 RESR 0 Function resume request bit
RESR = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
RESR = 1 Function resume is detected.
6 SUSR 0 Function suspended request bit. This bit is set in response to a global or selective suspend condition.
SUSR = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
SUSR = 1 Function suspend is detected.
7 RSTR 0 Function reset request bit. This bit is set in response to host initiating a port reset. This bit is not affected
by USB function reset.
RSTR = 0 MCU can clear this bit by writing a 1. (Writing 0 has no effect.)
RSTR = 1 Function reset is detected.
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