ST72321AR6 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
Description
The ST72F321 and ST72321 devices are members of the ST7 microcontroller family designed for mid-range applications.
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.
Under software control, all devices can be placed in WAIT, SLOW, ACTIVE-HALT or HALT mode, reducing power consumption when the application is in
idle or stand-by state.
The enhanced instruction set and addressing modes of the ST7 offer both power and flexibility to software developers, enabling the design of
highly efficient and compact application code. In addition to standard 8-bit data management, all ST7 microcontrollers feature
Key Features
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 oC
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 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
14 interrupt vectors plus TRAP and RESET
Top Level Interrupt (TLI) pin on 64-pin devices
15 external interrupt lines (on 4 vectors)
Up to 48 I/O Ports
48/32 multifunctional bidirectional I/O lines
34/22 alternate function lines
16/12 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
3 Communications Interfaces
SPI synchronous serial interface
SCI asynchronous serial interface
I2C multimaster interface
1 Analog peripheral
10-bit ADC with up to 16 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
Circuit Diagram
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