Datasheet

58
AT89C51AC3
4383D–8051–02/08
Figure 30. Hardware Boot Process Algorithm
Application
Programming Interface
Several Application Program Interface (API) calls are available for use by an application
program to permit selective erasing and programming of Flash pages. All calls are made
by functions.
All these APIs are describe in an documentation: "In-System Programing: Flash Library
for AT89C51AC3" available on the Atmel web site.
XROW Bytes Table 23. XROW Mapping
RESET
Hardware
condition?
BLJB = = 0
?
bit ENBOOT in AUXR1 register
is initialized with BLJB.
Hardware
Software
ENBOOT = 1
PC = F800h
ENBOOT = 1
PC = F800h
FCON = 00h
FCON = F0h
Boot Loader
in FM1
ENBOOT = 0
PC = 0000h
Yes
Yes
No
No
Application
in FM0
Description Default Value Address
Copy of the Manufacturer Code 58h 30h
Copy of the Device ID#1: Family code D7h 31h
Copy of the Device ID#2: Memories size and type FFh 60h
Copy of the Device ID#3: Name and Revision FEh 61h