M306V2EEFS datasheet(68/271 Pages) RENESAS

부품명	M306V2EEFS

상세설명	SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

PDF	271 Pages

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제조업체	RENESAS [Renesas Technology Corp]

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68 / 271 page

Rev.1.40

Oct 06, 2004 page 68 of 269

M306V2ME-XXXFP, M306V2EEFP

Figure 2.8.3 Watchdog timer start register

Watchdog timer start register

Symbol

Address

When reset

WDTS

000E16

Indeterminate

Function

The watchdog timer is initialized and starts counting after a write instruction to

this register. The watchdog timer value is always initialized to “7FFF 16”

regardless of whatever value is written.

BCLK

Write to the watchdog timer

start register

(address 000E 16)

RESET

Watchdog timer

interrupt request

Watchdog timer

Set to

“7FFF16”

1/128

1/16

“CM07 = 0”

“WDC7 = 1”

“CM07 = 0”

“WDC7 = 0”

“CM07 = 1”

HOLD

1/2

Prescaler

Figure 2.8.1 Block diagram of watchdog timer

Figure 2.8.2 Watchdog timer control register

Watchdog timer control register

Symbol

Address

When reset

WDC

000F16

000?????2

Function

Bit symbol

High-order bit of watchdog timer

WDC7

Bit name

Prescaler select bit

0 : Divided by 16

1 : Divided by 128

Reserved bits

Must always be set to “0”

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