Description
This data sheet describes the 6 clock version of the 8xC554.
80C51 central processing unit
16k × 8 EPROM expandable externally to 64k bytes
An additional 16-bit timer/counter coupled to
Features
- 83C554.
- 16k bytes ROM.
- 80C554.
- ROMless version.
- 87C554.
- 16k bytes EPROM
The 87C554 contains a 16k × 8 non-volatile EPROM, a 512 × 8 read/write data memory, five 8-bit I/O ports, one 8-bit input port, two 16-bit timer/event counters (identical to the timers of the 80C51), an additional 16-bit timer coupled to capture and compare latches, a 15-source, four-priority-level, nested interrupt structure, an 7-input ADC, a dual DAC pulse width modulated.
83C554_PhilipsSemiconductors.pdf