89C535/89C536/89C538 are single-chip 8-bit microcontrollers manufactured by Philips in advanced CMOS process and are derivatives of the 80C51 microcontroller family. All the devices have the same instruction set as the 80C51. The devices also have four 8-bit I/O ports, three 16-bit timer/event counters, a multi-source, two-priority-level, nested interrupt structure, UART and on-chip oscillator and timing circuits. For systems that require extra data memory capability up to 64k bytes, each can be expanded using standard TTL-compatible memories and logic. The 89C535/89C536/89C538 contain a non-volatile FLASH EPROM program memory (8K bytes in 89C535, 16k bytes in the 89C536, and 64k bytes in the 89C538). The devices have 512 bytes of RAM data memory.
This document is a preliminary specification datasheet for the Philips 89C535, 89C536, and 89C538 microcontrollers. These devices are single-chip 8-bit microcontrollers manufactured in an advanced CMOS process and are derivatives of the 80C51 family. They feature a non-volatile FLASH EPROM program memory with sizes ranging from 8K bytes to 64k bytes, 512 bytes of RAM, and four 8-bit I/O ports.
| Program Memory Size | 8K bytes (89C535), 16k bytes (89C536), 64k bytes (89C538) |
|---|---|
| RAM Size | 512 bytes |
| I/O Ports | Four 8-bit I/O ports |
| Interrupt Sources | 6 interrupt sources with 2 priority levels |
| Packages | 44-pin PLCC and QFP |
| Temperature Range | 0 to +70 °C |
The 89C535 has 8k x 8 FLASH EPROM program memory.
They are available in 44-pin Plastic Leaded Chip Carrier and 44-pin Plastic Quad Flat Package.
The devices have four 8-bit I/O ports.