ST6387 datasheet(22/84 Pages) STMICROELECTRONICS

부품명	ST6387

상세설명	8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING

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ST6365, ST6375, ST6385 ST6367, ST6377, ST6387

HARDWARE ACTIVATED DIGITAL WATCHDOG FUNCTION (Cont’d)

Hardware Activated Watchdog Register

(HWDR)

Address: D8h - Read/Write

Reset Value: 0FEh

T1-T6. These are the watchdog counter bits. It

should be noted that D7 (T1) is the LSB of the

counter and D2 (T6) is the MSB of the counter,

these bits are in the opposite order to normal.

SR. This bit is set to one during the reset phase

and will generate a software reset if cleared to ze-

ro.

C. This is the watchdog activation bit that is hard-

ware set. The watchdog function is always activat-

ed independently of changes of value of this bit.

The register reset value is FEh (Bit 1-7 set to one,

Bit 0 cleared).

Figure 18. Hardware Activated Watchdog

Working Principle

BIT0

VA00190

BIT1

BIT2

BIT3

BIT4

BIT5

BIT6

BIT7

8-BIT

DOWN COUNTER

OSC-12

RESET

ST6387 데이터시트(PDF) 22 Page - STMicroelectronics