DS89C430 datasheet(20/48 Pages) DALLAS

Part #	DS89C430

Description	Ultra-High-Speed Flash Microcontrollers

PDF	48 Pages

Scroll/Zoom	100%

Manufacturer	DALLAS [Dallas Semiconductor]

Direct Link	https://www.maximintegrated.com/en.html

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DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers

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Figure 6. Memory Map (as shown for the DS89C430)

External

Data

Memory

8K x 8

Flash

Memory

(Program)

1K x 8

SRAM

Data OR

prog mem

addr from

400 - 7FF

128 Bytes

Indirect

Addressing

Bit Addressable

Bank 3

Bank 2

Bank 1

Bank 0

128 Bytes SFR

0000

1FFF

2000

3FFF

INTERNAL

MEMORY

03FF

0000

FFFF

4000

0000

03FF

External

Program

Memory

INTERNAL

REGISTERS

8K x 8

Flash

Memory

(Program)

Memory Configuration

As illustrated in Figure 6, the DS89C430 incorporates two 8kB flash areas for on-chip program memory and 1kB of

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.

DS89C430 Datasheet(PDF) 20 Page - Dallas Semiconductor

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