beautypg.com

Register – FUJITSU MB91460 SERIES FR60 User Manual

Page 307

background image

291

Chapter 22 Main Oscillation Stabilisation Timer

4.Register

4. Register

4.1 OSCRH: Control Register for the Main Clock Oscillation Stability Wait Timer

This register is used to select the interval time, clear the timer, control the interrupt, control the timer such as
stop, and confirm the state of the timer.

• OSCRH: Address 04C8h (Access: Byte)

(For the attributes, refer to “

Meaning of Bit Attribute Symbols (Page No.10)

”.)

• Bit7: Timer interrupt request flag

• The timer interrupt request flag bit is set to “1” at the falling edge of the selected interval period output.

• Bit6: Interrupt request enable

• If the timer interrupt request flag (WIF) is set to “1” while the interrupt request enable (WIE) is “1” an

interrupt request is immediately generated.

• Bit5: Timer operation enable

• Bit4-3: Reserved bit Be sure to write “0”. The read value is “0”.

• Bit2-1: Interval period selection

• The reset does not initialize. Be sure to set it after the startup.

• Bit0: Timer clear

• The timer is also cleared by INITX terminal input and watchdog reset.

(Refer to “

8. Caution (Page No.297)

”.)

7

6

5

4

3

2

1

0

bit

WIF

WIE

WEN

WS1

WS0

WCL

0

0

0

X

X

0

0

1

Initial value

(INIT terminal input,

watchdog reset)

X

X

X

X

X

X

X

X

Initial value

(Software reset)

R(RM1),W

R/W

R/W

RX/W0

RX/W0

R/W

R/W

R1,W

Attribute

WIF

Read Operation

Write Operation

0

Without interrupt request

Clears interrupt request flags

1

With interrupt request

Writing does not affect operation

WIE

Operation

0

Interrupt request disable

1

Interrupt request enable

WEN

Operation

0

Stops timer operation

1

Enables timer operation

WS1

WS0

Interval period (At 4MHz)

0

0

Setting prohibted

0

1

2

12

/F

CL-MAIN

(1.0ms)

1

0

2

17

/F

CL-MAIN

(32.7ms)

1

1

2

23

/F

CL-MAIN

(2.0s)

WCL

Operation

0

Clears the main clock oscillation stability wait timer

1

Writing does not affect operation