Z51F3220FNX Datasheet, PDF (281/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
Counting for config read start after POR is released
VDD
Internal nPOR
PAD RESETB
“H”
LVR_RESETB
BIT (for Config) 00 01 02 03
00
01
.. _{27 28}
F1
BIT (for Reset)
00
Config Read
RESET_SYSB
INT-OSC (8MHz)
INT-OSC 8MHz/8
00
01
02
03
1us X 256 X 28h = about 10ms
1us X 4096 X 4h = about 16ms
INT-OSC 8MHz / 8 = 1MHz (1us)
Figure 13.5 Configuration Timing when Power-on
04
05
Reset Release
Config Read
:VDD Input
:Internal OSC
⑥
④
②
POR
①
③
⑤
⑦
Figure 13.6 Boot Process WaveForm
PS029902-0212
PRELIMINARY
279