1 FEATURES
· 80C51 Central Processing Unit
· 8 kbytes ROM, expandable externally to 64 kbytes
· 256 bytes RAM, expandable externally to 64 kbytes
· Two standard 16-bit timer/counters
· An additional 16-bit timer/counter coupled to four
capture registers and three compare registers
· An 8-bit ADC with 8 multiplexed analog inputs
· Two 8-bit resolution, Pulse Width Modulated outputs
· Five 8-bit I/O ports plus one 8-bit input port shared with
analog inputs
· Full-duplex UART compatible with the standard 80C51
· On-chip Watchdog Timer
· Oscillator frequency: 3.5 to 16 MHz.

2 GENERAL DESCRIPTION
The P80C562/P83C562 (hereafter generally referred to as
P8xC562) single-chip 8-bit microcontroller is
manufactured in an advanced CMOS process and is a
derivative of the 80C51 microcontroller family.
The P8xC562 has the same instruction set as the 80C51.
Two versions of the derivative exist:
· With 8 kbytes mask-programmable ROM
· ROMless version of the P8xC562.
This I/O intensive device provides architectural
enhancements to function as a controller in the field of
automotive electronics, specifically engine management
and gear box control.
The P8xC562 contains a non-volatile 8 kbyte read only
program memory, a volatile 256 byte read/write data
memory, six 8-bit I/O ports, 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
fourteen-source, two-priority-level, nested interrupt
structure, an 8-input ADC, a dual DAC with pulse width
modulated outputs, a serial interface (UART), a
Watchdog Timer and on-chip oscillator and timing circuits.
For systems that require extra capability, the P8xC562 can
be expanded using standard TTL compatible memories
and logic.
The device also functions as an arithmetic processor
having facilities for both binary and BCD arithmetic plus
bit-handling capabilities. The instruction set consists of
over 100 instructions: 49 one-byte, 45 two-byte and
17 three-byte. With a 16 MHz crystal, 58% of the
instructions are executed in 0.75 ms and 40% in 1.5 ms.
Multiply and divide instructions require 3 ms.