Z51F0410 Datasheet, PDF (149/184 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F0410
Product Specification
and after the stable state, the internal RESET becomes ‘1’. The Reset process step needs 5 oscillator
clocks. And the program execution starts at the vector address stored at address 0000H.
OSC
RESETB
Internal
RESETB
ADDRESS
BUS
CORE
BUS
TST = 16ms
1 234 5
Release
Release
?
?
00
01 02 ?
Stabilization Time
?
?
? 02 ? ? ?
RESET
Step
Process _{Main Program}
Figure 6.7 Timing Diagram after RESET
VDD
PRESCALER COUNT START
OSC START TIMING
Note) as shown Figure 13-8, t^Fhⁱe^gust^ra^eb⁶le^.8g^Oen^se^crⁱa^llt^ain^tog^rti^gm^ee^neis^ran^toⁱⁿt ^ginc^wlu^ad^ve^ed^foin^rmth^exs^at^mar^pt-^lu^ep time.
6.7 Brown Out Detector Processor
The Z51F0410 MCU features an On-chip Brown-out detection circuit for monitoring the VDD level
during operation by comparing it to a fixed trigger level. The trigger level for the BOD can be selected
by BODLS[1:0] bit to be 1.6V, 2.5V, 3.6V or 4.3V. In the STOP mode, this will contribute significantly
to the total current consumption. So to minimize the current consumption, the BODEN bit is set to off
by software.
PS029502-0212
PRELIMINARY
146