89C535

Features:

80C51 Central Processing Unit
8k x 8 (89C535) 16k  8 (89C536) or 64k  8 (89C538), FLASH EPROM Program Memory
512  8 RAM, externally expandable to 64k  8 Data Memory
Three 16-bit counter/timers
Up to 3 external interrupt request inputs
6 interrupt sources with 2 priority levels
Four 8-bit I/O ports
Full-duplex UART
Power control modes
- Idle mode
- Power down mode, with wakeup from power down using external interrupt
44-pin PLCC and QFP packages

Pinout




Specifications

PARAMETER	RATING	UNIT
Operating temperature under bias	0 to+70
Storage temperature range	-65 to +150
Voltage on EA/VPP pin to VSS	0 to +13.0	V
Voltage on any other pin to VSS	-0.5 to +6.5	V
Maximum I per IOL/O pin	15	mA
Power dissipation (based on package heat transfer limitations, not device power consumption)	1	W

Description

The 89C535/89C536/89C538 are Single-Chip 8-Bit Microcontrollers manufactured in advanced CMOS process and are derivatives of the 80C51 microcontroller family. 89C535/89C536/89C538 have the same instruction set as the 80C51.

The 89C535/89C536/89C538 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 89C535/89C536/89C538 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 89C535/89C536/89C538 have 512 bytes of RAM data memory.