W79E225A_08 Datasheet, PDF (18/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
PAGE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
START ADDRESS END ADDRESS PAGE START ADDRESS
0000h
003Fh
16
0400h
0040h
007Fh
17
0440h
0080h
00BFh
18
0480h
00C0h
00FFh
19
04C0h
0100h
013Fh
20
0500h
0140h
017Fh
21
0540h
0180h
01BFh
22
0580h
01C0h
01FFh
23
05C0h
0200h
023Fh
24
0600h
0240h
027Fh
25
0640h
0280h
02BFh
26
0680h
02C0h
02FFh
27
06C0h
0300h
033Fh
28
0700h
0340h
037Fh
29
0740h
0380h
03BFh
30
0780h
03C0h
03FFh
31
07C0h
[Note: Page 16-31 is for W79E226/227 only]
Table 6-4: W79E22X SERIES NVM page (n) area definition table
END ADDRESS
043Fh
047Fh
04BFh
04FFh
053Fh
057Fh
05BFh
05FFh
063Fh
067Fh
06BFh
06FFh
073Fh
077Fh
07BFh
07FFh
It has a dedicated On-Chip RC Oscillator that is fixed at 6MHz +/- 25% frequency to support clock
source for the 1/2/2K NVM data Flash. The on chip oscillator is enabled only during program or erase
operation, through EWR or EER in NVMCON SFR. EWR or EER bits are cleared by hardware after
program or erase operation completed. The program/erase time is automatically controlled by
hardware.
Figure 6-4: NVM control
- 18 -
Publication Release Date: April 15, 2008
Revision A4.0