GENERAL DESCRIPTION
The PCD3349A provides 4 kbytes of Program Memory, 224 bytes of RAM and 20 I/O lines.
The PCD3349A is a microcontroller which has been designed primarily for telecom applications. It includes an on-chip dual tone multi-frequency (DTMF) generator.
The instruction set is based on that of the MAB8048 and is software compatible with the PCD33xxA family.

FEATURES
• 8-bit CPU, ROM, RAM, I/O in a single 28-lead package
• 4-kbyte ROM
• 224-byte RAM
• Over 100 instructions (based on MAB8048) all of 1 or 2 cycles
• 20 quasi-bidirectional I/O port lines
• 8-bit programmable Timer/event counter 1
• 2 single-level vectored interrupts:
   – external
   – Timer/event counter 1
• Two test inputs, one of which also serves as the external interrupt input
• DTMF tone generator
• Reference for supply and temperature-independent TONE output
• Filtering for low output distortion (CEPT compatible)
• Power-on-reset
• Stop and Idle modes
• Supply voltage: 1.8 to 6 V (DTMF TONE output from 2.5 V)
• Low standby voltage of 1 V
• Low Stop mode current of 1 µA (typical)
• Clock frequency: 1 to 16 MHz (3.58 MHz for DTMF suggested)
• Manufactured in silicon gate CMOS process.