ST9
8-bit microcontrollers for automotive

Core

• Register oriented 8/16-bit core
• 224 general purpose registers (register file)

Memories

• Up to 256 Kbytes of single-voltage Flash program memory
• Up to 8 Kbytes of RAM
• Hardware emulation of 1-Kbyte EEPROM (E3 TM)
• In-application programming
• Readout protection (ROP) on flash and EEPROM

Clock, reset and power supply

• Power supply operating range: 4.5 V
  to 5.5 V
• Up to 24 MHz operating frequency (internal clock)
• PLL clock generator (3-5 MHz crystal)
• Power saving modes: WFI, SLOW, HALT and STOP

Interrupts and DMA

• 16 internal, 20 external, 1 non- maskable
• DMA controller

I/O ports

• 80 fully-programmable I/Os

Peripherals

• 10-bit 16-channel ADC and two automatic
• 6x16-bit timers including two multifunction timers with sophisticated PWM capabilities generation, motor control features

Communication

• SPI
• SCI-M (asynchronous/synchronous capabilities)
• SCI-A (with LIN break generation capability)
• J1850 byte level protocol decoder (JBLPD)
• Up to two full I²C
• Up to two CAN 2.0B active interfaces with enhanced filtering mechanism

Instruction set

• Operation on bits, BCD, 8-bit and 16-bit data
• 14 addressing modes
• Register file with 8-bit and 16-bit accumulators and index pointers