DS89C420

更新时间： 2024-12-01 04:15:19

品牌	Logo	应用领域
美信 - MAXIM		微控制器
页数	文件大小	规格书
58页	670K
描述
Ultra-High-Speed Microcontroller

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数据手册

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DS89C420 数据手册

DS89C420

Ultra-High-Speed Microcontroller

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT (Top View)

§ 80C52 compatible

P1.0/T2

P1.1/T2EX

P1.2/RXD1

P1.3/TXD1

P1.4/INT2

P1.5/INT3

P1.6/INT4

P1.7/INT5

RST

VCC

P0.0

P0.1

P0.2

P0.3

P0.4

P0.5

P0.6

P0.7

EA/VPP

ALE/PROG

PSEN

P2.7

- 8051 pin and instruction-set compatible

- Four bidirectional I/O ports

- Three 16-bit timer counters

- 256 bytes scratchpad RAM

§ On-chip memory

P3.0/RXD0

P3.1/TXD0

P3.2/INT0

P3.3/INT1

P3.4/T0

DS89C420

- 16kB flash memory

- In-system programmable through serial

port

P2.6

P2.5

P3.5/T1

- 1kB SRAM for MOVX

P3.6/WR

P3.7/RD

P2.4

P2.3

§ ROMSIZE feature

XTAL2

XTAL1

P2.2

P2.1

- Selects internal program memory size from

0 to 16k

VSS

P2.0

40-Pin DIP

- Allows access to entire external memory

map

- Dynamically adjustable by software

§ High-speed architecture

- 1 clock-per-machine cycle

- DC to 33MHz operation

DS89C420

- Single-cycle instruction in 30ns

- Optional variable length MOVX to access

fast/slow peripherals

- Dual data pointers with auto

increment/decrement and toggle select

- Supports four paged modes

44-Pin PLCC

§ Power Management Mode

- Programmable clock divider

- Automatic hardware and software exit

§ Two full-duplex serial ports

§ Programmable watchdog timer

§ 13 interrupt sources (six external)

§ Five levels of interrupt priority

§ Power-fail reset

DS89C420

§ Early warning power-fail interrupt

44-Pin TQFP

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple

revisions of any device may be simultaneously available through various sales channels. For information about device errata,

click here: http://www.maxim-ic.com/errata.

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