ZiLOG Z8

Z8 Microcontrollers
ZiLOG Reset—Watch-Dog Timer
UM001601-0803 4-5
Figure 4-3. Example of Z8 Reset with RESET Pin, WDT, SMR, and POR
256 TpC 256 512 1024 4096
WDT/POR Counter Chain
POR TpC TpC TpC TpC
+
-
M
WDT TAP SELECT
Clear 18 Clock RESET RESET
CLK Generator
4 Clock
Filter
CK CLR
RC
OSC.
U
X
Internal
RESET
2.6V Operating
Voltage Det.
/RESET
From Stop Mode
Recovery Source
Stop Delay
Select (SMR)
/WDT
.
VDD
XTAL
WDT Select
(WDTMR)
CLK Source
Select (WDTMR)
2.6V REF