• Fully compatible to standard 8051 microcontroller

• Up to 40 MHz external operating frequency

• 16 Kbyte on-chip program memory

– C504-2R: ROM version (with optional ROM protection)

– C504-2E: programmable OTP version

– C504-L: without on-chip program memory

• 256 byte on-chip RAM

• 256 byte on-chip XRAM

• Four 8-bit ports

– 2 ports with mixed analog/digital I/O capability

• Three 16-bit timers/counters

– Timer 2 with up/down counter feature

• Capture/compare unit for PWM signal generation and signal capturing

– 3-channel, 16-bit capture/compare unit

– 1-channel, 10-bit compare unit

• Full duplex serial interface (USART)

• 10-bit A/D Converter with 8 multiplexed inputs

• Twelve interrupt sources with two priority levels

• On-chip emulation support logic (Enhanced Hooks Technology TM)

• Programmable 15-bit Watchdog Timer

• Oscillator Watchdog

• Fast Power On Reset

• Power Saving Modes

– Idle mode

– Power-down mode with wake-up capability through INT0

• M-QFP-44 package

• Temperature ranges: SAB-C504 TA: 0 to 70 °C

                              SAF-C504 TA: – 40 to 85 °C

                              SAK-C504 TA: – 40 to 125 °C

                                  (max. operating frequency: 24 MHz)