Introduction
The C515A is a member of the Siemens C500 family of 8-bit microcontrollers. lt is functionally fully compatible with the SAB 80C515/83C515A-5 microcontrollers.
The C515A basically operates with internal and/or external program memory. The C515A-L is identical to the C515A-4R, except that it lacks the on-chip program memory. Therefore, in this documentation the term C515A refers to all versions within this specification unless otherwise noted.

Listed below is a summary of the main features of the C515A:

• Full upward compatibility with SAB 80C515A/83C515A-5
• Up to 24 MHz external operating frequency
   – 500 ns instruction cycle at 24 MHz operation
• 32K byte on-chip ROM (with optional ROM protection)
   – alternatively up to 64K byte external program memory
• Up to 64K byte external data memory
• 256 byte on-chip RAM
• 1K byte on-chip RAM (XRAM)
• On-chip emulation support logic (Enhanced Hooks Technology TM)
• Six 8-bit parallel I/O ports
• One input port for analog/digital input
• Full duplex serial interface (USART)
   – 4 operating modes, fixed or variabie baud rates
• Three 16-bit timer/counters
   – Timer 0 / 1 (C501 compatible)
   – Timer 2 for 16-bit reload, compare, or capture functions
• 10-bit A/D converter
   – 8 multiplexed analog inputs
   – Built-in self calibration
• 16-bit watchdog timer
• Power saving modes
   – Slow down mode
   – Idle mode (can be combined with slow down mode)
   – Software power down mode with wake-up capability through INT0 pin
   – Hardware power down mode
• 12 interrupt sources (7 external, 5 internal) selectable at 4 priority levels
• ALE switch-off capability
• P-MQFP-80 packages
• Temperature Ranges : SAB-C515A-4R TA = 0 to 70 °C
                                       SAF-C515A-4R TA = – 40 to 85 °C
                                       SAH-C515A-4R TA = – 40 to 110 °C
                                       SAK-C515A-4R TA = – 40 to 125 °C (max. frequency : 18 MHz)