This document describes the features and characteristics of Silicon Storage Technology, Inc.'s products, including 8-bit 8051-compatible microcontroller, embedded SuperFlash memory, dual block SuperFlash EEPROM, high-current drive ports, timers/counters, UART, etc.
This document provides preliminary specifications for the SST FlashFlex51 family of 8-bit microcontrollers (MCUs), specifically the SST89E5xxRD2 and SST89V5xxRD2 series. These devices are designed with SST's proprietary SuperFlash CMOS technology and feature an embedded dual-block EEPROM, making them pin-for-pin compatible with standard 8051 microcontrollers.
The datasheet details functional blocks, memory organization, timer configurations, serial interfaces (UART and SPI), security lock mechanisms, and power-saving modes. It includes electrical specifications for both 3V and 5V operation ranges and provides timing diagrams for programming and external memory access.
| Architecture | 8-bit 8051-Compatible Microcontroller |
|---|---|
| Internal RAM | 1 KByte |
| Primary Flash Block Sizes | 8/16/32/64 KByte |
| Secondary Flash Block Size | 8 KByte |
| External Address Range | up to 64 KByte |
| I/O Ports | Four 8-bit I/O Ports (32 I/O Pins) and One 4-bit Port |
| Operating Frequency (5V) | 0 to 40 MHz |
| Operating Frequency (3V) | 0 to 33 MHz |
The SST89E5xxRD2 operates from 0 to 40 MHz at 5V.
The SST89V5xxRD2 operates from 0 to 33 MHz at 3V.
The devices include 1 KByte of internal RAM.