Zilog Z8PE002 - Manual (Page 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