S12A Automotive and Industrial Microcontrollers (MCUs)

S12A

The MC9S12A512 MCU is a 16-bit device composed of standard on-chip peripherals, including a HCS12 CPU.

System resource mapping, clock generation, interrupt control and bus interfacing are managed by the system integration module (SIM).

The MC9S12A512 has full 16-bit data paths throughout, however the external bus can operate in an 8-bit narrow mode so single 8-bit wide memory can be interfaced for lower cost systems.

The inclusion of a phase-lock loop (PLL) circuit allows power consumption and performance to be adjusted.

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Block Diagram

S12A Microcontroller Block Diagram

S12A Microcontroller Block Diagram
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Features

  • 16-bit HCS12 CPU
  • Upward compatible with M68HC11 instruction set
  • Interrupt stacking and programmer's model identical to M68HC11
  • Instruction pipe
  • Enhanced indexed addressing
  • Multiplexed external bus
  • Memory
  • 512 KB flash EEPROM
  • 4 KB EEPROM
  • 14 KB RAM
  • Two asynchronous serial communications interfaces (SCI)
  • Three serial peripheral interfaces (SPI)
  • Two 8-channel ADCs
  • 8-channel pulse-width modulator (PWM)
  • 29 discrete digital I/O channels (Port A, Port B, Port K and Port E)
  • 20 discrete digital I/O lines with interrupt and wake-up capability
  • Inter-IC Bus
  • 10-bit resolution
  • Software-compatible modules

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