Zilog Z8PE002 Manual do Utilizador descarregar pdf (Página 17)

Z8PE002

ZiLOG Z8Plus OTP Microcontroller

DS008700-Z8X0799 P R E L I M I N A R Y 17

Figure 9. Reset Timing

Figure 10. Reset Circuitry with POR, WDT, V

BO

, and SMR

First Machine Cycle

Clock

Internal

First Instruction Fetch

128 XTAL Clock Cycles

10 XTAL CLOCK CYCLES

Reset

XTAL

÷64

TCTLHI

D6,D5,D4

3

64 SCLK

SMR

(PB0)

WDTRST

16-Bit Timer

WDT Tap Select

Watch-Dog Timer

SMR Logic

V

BO

/POR

POR Delay

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 47 48

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