w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 59

• Manufacturer Part Number: w79e532
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

15. IN-SYSTEM PROGRAMMING
15.1
CPU is Free Run at APFlash memory. CHPCON register had been set #03H value before CPU has
entered idle state. CPU will switch to LDFlash memory and execute a reset action. H/W reboot mode
will switch to LDFlash memory, too. Set SFRCN register where it locates at user's loader program to
update APFlash bank 0 or bank 1 memory. Set a SWRESET (CHPCON.7) to switch back APFlash
after CPU has updated APFlash program. CPU will restart to run program from reset state.
15.2
CPU is Free Run at APFlash memory. CHPCON register had been set #01H value before CPU has
entered idle state. Set SFRCN register to update LDFlash or another bank of APFlash program. CPU
will continue to run user's APFlash program after CPU has updated program. Please refer
demonstrative code to understand other detail description.
16. H/W WRITER MODE
This mode is for the writer to write / read Flash EPROM operation. A general user may not enter this
mode.
The Loader Program Locates at LDFlash Memory
The Loader Program Locates at APFlash Memory
PSEN
P2.7
P2.6
P3.7
P3.6
RST
ALE
EA
The Timing For Entering Flash EPROM
Mode on the Programmer
300ms
- 59 -
10ms
Publication Release Date: November 21, 2005
W79E532/W79L532
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Revision A5