GENERAL DESCRIPTION
This data sheet details the specific properties of the PCF84C12A, PCF84C22A and PCF84C42A. The shared properties of the PCF84CxxxA family of microcontrollers are described in the “PCF84CxxxA family” data sheet, which should be read in conjunction with this publication. Note that the devices described in this data sheet do not feature I2C-bus compatibility or derivative logic, so the information given in the family data sheet about these features can be ignored.

FEATURES
• Manufactured in silicon gate CMOS process
• 8-bit CPU, ROM, RAM, I/O in a 20-lead package
• 1 kbyte ROM (PCF84C12A)
• 2 kbyte ROM (PCF84C22A)
• 4 kbyte ROM (PCF84C42A)
• 64 byte RAM
• Over 100 instructions (based on MAB8048) all of 1 or 2 cycles
• 13 quasi-bidirectional I/O port lines
• 8-bit programmable timer/event counter 1
• Two single-level vectored interrupts:
   – external
   – 8-bit programmable timer/event counter 1
• Two test inputs, one of which also serves as the external interrupt input
• Stop and Idle modes
• Supply voltage: 2.5 to 5.5 V
• Clock frequency: 1 to 16 MHz
• Operating temperature: −40 to +85 °C.