INTRODUCTION

The ST72324K and ST72324J devices are members of the ST7 microcontroller family. They can be grouped as follows:
– The 32-pin ST72324K devices are designed for mid-range applications
– The 42/44-pin ST72324J devices target the same range of applications requiring more than 24 I/O ports.

All devices are based on a common industrystandard 8-bit core, featuring an enhanced instruction set and are available with FLASH or ROM program memory.

■ Memories

– 8 to 32K dual voltage High Density Flash (HDFlash) or ROM with read-out protection capability. In-Application Programming and InCircuit Programming for HDFlash devices
– 384 to 1K bytes RAM
– HDFlash endurance: 100 cycles, data retention: 20 years at 55°C
■ Clock, Reset And Supply Management
– Enhanced low voltage supervisor (LVD) for main supply with 3 programmable reset thresholds and auxiliary voltage detector (AVD) with interrupt capability
– Clock sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
– PLL for 2x frequency multiplication
– Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
■ Interrupt Management
– Nested interrupt controller
– 10 interrupt vectors plus TRAP and RESET
– 9/6 external interrupt lines (on 4 vectors)
■ Up to 32 I/O Ports
– 32/24 multifunctional bidirectional I/O lines
– 22/17 alternate function lines
– 12/10 high sink outputs
■ 4 Timers
– Main Clock Controller with: Real time base, Beep and Clock-out capabilities
– Configurable watchdog timer
– 16-bit Timer A with: 1 input capture, 1 output compare, external clock input, PWM and pulse generator modes
– 16-bit Timer B with: 2 input captures, 2 output compares, PWM and pulse generator modes
■ 2 Communication Interfaces
– SPI synchronous serial interface
– SCI asynchronous serial interface (LIN compatible)
■ 1 Analog Peripheral
– 10-bit ADC with up to 12 input pins
■ Instruction Set
– 8-bit Data Manipulation
– 63 Basic Instructions
– 17 main Addressing Modes
– 8 x 8 Unsigned Multiply Instruction
■ Development Tools
– Full hardware/software development package
– In-Circuit Testing capability