DS89C430-DS89C450 Dallas Semiconducotr, DS89C430-DS89C450 Datasheet - Page 20

• Manufacturer Part Number: DS89C430-DS89C450
• Description: Ultra-High-Speed Flash Microcontrollers
• Manufacturer: Dallas Semiconducotr

Figure 6. Memory Map (as shown for the DS89C430)
Memory Configuration
As illustrated in
SRAM for on-chip data memory or a particular range (400–7FF) of “alternate” program memory space. The
DS89C440 incorporates two 16kB flash memories and the DS89C450 incorporates two 32kB flash memories. The
DS89C430 uses an address scheme that separates program memory from data memory such that the 16-bit
address bus can address each memory area up to maximum of 64kB.
FF
80
7F
2F
20
1F
00
Bit Addressable
128 Bytes
Indirect
Addressing
Bank 3
Bank 2
Bank 1
Bank 0
128 Bytes SFR
REGISTERS
Figure
INTERNAL
6, the DS89C430 incorporates two 8kB flash areas for on-chip program memory and 1kB of
03FF
0000
3FFF
2000
1FFF
0000
INTERNAL
MEMORY
(Program)
addr from
prog mem
Memory
(Program)
400 - 7FF
8K x 8
Data OR
Memory
8K x 8
SRAM
Flash
1K x 8
Flash
20 of 47
FFFF
4000
0000
External
Program
Memory
FFFF
03FF
0000
External
Data
Memory