Datasheet

USB Registers
25
SLLS519H—January 2010 TUSB3410, TUSB3410I
5 USB Registers
5.1 FUNADR: Function Address Register (Addr:FFFFh)
This register contains the device function address.
765 4 32 1 0
RSV FA6 FA5 FA4 FA3 FA2 FA1 FA0
R/O R/W R/W R/W R/W R/W R/W R/W
BIT
NAME RESET FUNCTION
6−0 FA[6:0] 0 These bits define the current device address assigned to the function. The MCU writes a value to this
register because of the SET-ADDRESS host command.
7 RSV 0 Reserved = 0
5.2 USBSTA: USB Status Register (Addr:FFFEh)
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).
765 4 32 1 0
RSTR
SUSR RESR RSV URRI SETUP WAKEUP STPOW
R/C R/C R/C R/O R/C R/C R/C R/C
BIT
NAME RESET FUNCTION
0 STPOW 0
SETUP overwrite bit. Set by hardware when a setup packet is received while there is already a packet
in the setup buffer.
STPOW = 0
STPOW = 1
MCU can clear this bit by writing a 1 (writing 0 has no effect).
SETUP overwrite
1 WAKEUP 0
Remote wakeup bit
WAKEUP = 0
WAKEUP = 1
The MCU can clear this bit by writing a 1 (writing 0 has no effect).
Remote wakeup request from WAKEUP terminal
2 SETUP 0
SETUP transaction received bit. As long as SETUP is 1, IN and OUT on endpoint-0 are NAKed,
regardless of their real NAK bits value.
SETUP = 0
SETUP = 1
MCU can clear this bit by writing a 1 (writing 0 has no effect).
SETUP transaction received
3 URRI 0
UART RI (ring indicate) status bit – a rising edge causes this bit to be set.
URRI = 0
URRI = 1
The MCU can clear this bit by writing a 1 (writing 0 has no effect).
Ring detected, which is used to wake the chip up (bring it out of suspend).
4 RSV 0 Reserved
5 RESR 0
Function resume request bit
RESR = 0
RESR = 1
The MCU can clear this bit by writing a 1 (writing 0 has no effect).
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
SUSR = 1
The MCU can clear this bit by writing a 1 (writing 0 has no effect).
Function suspend is detected
7 RSTR 0
Function reset request bit. This bit is set in response to the USB host initiating a port reset. This bit is
not affected by the USB function reset.
RSTR = 0
RSTR = 1
The MCU can clear this bit by writing a 1 (writing 0 has no effect).
Function reset is detected