DS89C420-QCL Datasheet, PDF (1/139 Pages) Maxim Integrated Products – Ultra-High-Speed Flash Microcontroller User’s Guide

Rev: 6, 12/04
Ultra-High-Speed Flash
Microcontroller User’s Guide
33
16kB
FLASH MEMORY
1kB
SRAM
DUAL DATA
POINTERS
WITH AUTO-
SELECT
INCREMENT/
DECREMENT
HIGH-SPEED
ONE CLOCK-CYCLE
8051 MICROPROCESSOR
DUAL SERIAL
PORTS
FOUR
8-BIT
PARALLEL
PORTS
25
5
1
0
ORIGINAL
8051
ULTRA-HIGH-SPEED
FLASH
MICROCONTROLLER
The Ultra-High-Speed Flash Microcontroller User’s Guide should be used in conjunction with the data sheets(s) for all ultra-high-speed flash microcontrollers.
TABLE OF CONTENTS
SECTION 1: INTRODUCTION
5
SECTION 2: ORDERING INFORMATION
5
SECTION 3: ARCHITECTURE
5
ALU
5
Special-Function Registers
6
Accumulator
6
B Register
6
Program Status Word
6
Data Pointer(s)
6
Stack Pointer
6
I/O Ports
6
Timer/Counters
6
UARTs
6
Scratchpad Registers (RAM)
6
Stack
6
Working Registers
7
Program Counter
7
Address/Data Bus
7
Watchdog Timer
7
Power Monitor
7
Interrupts
7
Timing Control
7
Flash Memory
7
________________________________________________________________________ Maxim Integrated Products 1