T89C51CC01 Atmel, T89C51CC01 Datasheet - Page 38

• Manufacturer Part Number: T89C51CC01
• Description: Enhanced 8-Bit Microcontroller
• Manufacturer: Atmel

Figure 19. External Code Fetch Waveforms
Flash Memory
Architecture
Figure 20. Flash Memory Architecture
38
T89C51CC01
Extra Row (128 Bytes)
Hardware Security (1 byte)
Column Latches (128 Bytes)
CPU Clock
PSEN#
ALE
P0
P2
D7:0
PCH
T89C51CC01 features two on-chip Flash memories:
•
•
The FM0 can be program by both parallel programming and Serial In-System-Program-
ming (ISP) whereas FM1 supports only parallel programming by programmers. The ISP
mode is detailed in the "In-System-Programming" section.
All Read/Write access operations on Flash Memory by user application are managed by
a set of API described in the "In-System-Programming" section.
7FFFh
0000h
Flash memory FM0:
containing 32K Bytes of program memory (user space) organized into 128 byte
pages,
Flash memory FM1:
2K Bytes for boot loader and Application Programming Interfaces (API).
PCL
Flash memory
32K Bytes
user space
FM0
PCH
D7:0
PCL
FM1 mapped between F800h and
FFFFh when bit ENBOOT is set in
AUXR1 register
Flash memory
PCH
boot space
2K Bytes
FM1
D7:0
FFFFh
F800h
4129K–CAN–01/05