r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1580

Manufacturer Part Number

r5s77631ay266bgv

Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series

Manufacturer

Renesas Electronics Corporation.

Section 36 USB Function Controller (USBF)

IFR4 is an interrupt flag register for for TMOUT. When each flag is set to 1 and an interrupt is

enabled in the corresponding bit of IER4, an interrupt request (USBFI0 or USBFI1) specified by

the corresponding bit in ISR4 is issued to INTC.

Clearing the flag is performed by writing 0. Writing 1 is not valid and nothing is changed. To clear

bits, access the register so that 0 should be written only to the bits for the interrupt sources to be

cleared and that 1 should be written to the other bits. Do not use a bit field declaration of the C

language to clear bits.

Rev. 1.00 Oct. 01, 2007 Page 1514 of 1956

REJ09B0256-0100

Initial value:

Interrupt Flag Register 4 (IFR4)

Initial Value

R/W Description

R/W Time Out

These bits are always read as undefined value. Write

value should always be 0.

These bits are always read as 0. The write value

should always be 0.

[Setting condition]

When the value of the timer register (TMR) is reached

to that of the set time out register (STO).

[Clearing conditions]

When 0 is written to by CPU