• 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)