DESCRIPTION

The ST72F324L and ST72324BL devices are members of the ST7 microcontroller family designed for mid-range applications running at 3.3V. Different package options offer up to 32 I/O pins.

All devices are based on a common industry standard 8-bit core, featuring an enhanced instruction set and are available with Flash or ROM program memory. The ST7 family architecture offers both power and flexibility to software developers, enabling the design of highly efficient and compact application code. The on-chip peripherals include an A/D converter, 2 general purpose timers, an SPI interface and an SCI interface.

For power economy, microcontroller can switch dynamically into WAIT, SLOW, ACTIVE-HALT or HALT mode when the application is in idle or stand-by state.

Features

■ Memories

   – 8 to 32K dual voltage High Density Flash (HD Flash) or ROM with read-out protection capability. In-Application Programming and In Circuit Programming for HDFlash devices

   – 384 to 1K bytes RAM

   – HDFlash endurance: 100 cycles, data retention: 40 years at 85°C

■ Clock, Reset And Supply Management

   – Clock sources: crystal/ceramic resonator os cillators, internal RC oscillator, 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

■ 1 Analog Peripheral

   – 10-bit ADC with up to 12 input ports

■ 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