INTRODUCTION
●The ST72F521 and ST72521B devices are members of the ST7 microcontroller family designed for mid-range applications with a CAN bus interface(Controller Area Network).
●All devices are based on a common industry standard 8-bit core, featuring an enhanced instruc tion set and are available with FLASH or ROM program memory.
●■ Memories
● – 32K to 60K dual voltage High Density Flash (HDFlash) or ROM with read-out protection capability. In-Application Programming and In-Circuit Programming for HDFlash devices
● – 1K to 2K 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 and auxiliary voltage detector (AVD) with interrupt capability – 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
● – 14 interrupt vectors plus TRAP and RESET
● – Top Level Interrupt (TLI) pin
● – 15 external interrupt lines (on 4 vectors)
●■ Up to 64 I/O Ports
● – 48 multifunctional bidirectional I/O lines
● – 34 alternate function lines
● – 16 high sink outputs
●■ 5 Timers
● – Main Clock Controller with: Real time base, Beep and Clock-out capabilities
● – Configurable watchdog timer
● – Two 16-bit timers with: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes – 8-bit PWM Auto-Reload timer with: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector
●■ 4 Communications Interfaces
● – SPI synchronous serial interface
● – SCI asynchronous serial interface
● – I2C multimaster interface (SMbus V1.1 compliant)
● – CAN interface (2.0B Passive)
●■ Analog periperal (low current coupling)
● – 10-bit ADC with 16 input robust 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
