Watch Prescaler Control Register (Wpcr) - Fujitsu MB95630H Series Hardware Manual

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CHAPTER 9 WATCH PRESCALER

9.5 Register

Watch Prescaler Control Register (WPCR)

The watch prescaler control register (WPCR) is a register used to select the

interval time, clear the counter, control interrupts and check the status of the

watch prescaler.

■ Register Configuration

Initial value

■ Register Functions

[bit7] WTIF: Watch prescaler interrupt request flag bit

This bit is set to "1" when the interval time selected by the watch prescaler has elapsed.

When this bit and the watch prescaler interrupt request enable bit (WTIE) are set to "1", a watch prescaler

interrupt request is output.

When read by the read-modify-write (RMW) type of instruction, this bit always returns "1".

[bit6] WTIE: Watch prescaler interrupt request enable bit

This bit enables or disables output of interrupt requests to interrupt controller.

When this bit and the watch prescaler interrupt request flag bit (WTIF) are set to "1", a watch prescaler

interrupt request is output.

[bit5:4] Undefined bits

Their read values are always "0". Writing values to these bits has no effect on operation.

Indicates that the interval time has not elapsed.

Indicates that the interval time has elapsed.

Clears this bit.

Has no effect on operation.

Disables the watch prescaler interrupt request.

Enables the watch prescaler interrupt request.

FUJITSU SEMICONDUCTOR LIMITED

MB95630H Series

MN702-00009-1v0-E