ZiLOG Z8 User Manual page 44

Z8 Microcontrollers
Reset—Watch-Dog Timer
4.2 RESET PIN, INTERNAL POR OPERATION (Continued)
WDT Select
(WDTMR)
CLK Source
Select (WDTMR)
XTAL
V
DD
+
-
V
LV
WDT
.
From Stop Mode
Recovery Source
Stop Delay
Select (SMR)
4-6
CLEAR
4 Clock
CLK
Filter
M
U
Internal
X
RC OSC.
2V Operating
Voltage Det.
Figure 4-4. Example of Z8 Reset with WDT, SMR, and POR
18 Clock RESET RESET
Generator
WDT TAP SELECT
5ms POR 5ms 15ms 25ms
CLK
WDT/POR Counter Chain
CLR
Internal
RESET
100ms
UM001601-0803
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