The ST72F32A and ST7232A devices are members of the ST7 microcontroller family designed for the 5V operating range. The 32 and 44-pin devices are 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 true bit manipulation, 8×8 unsigned multiplication and indirect addressing modes.
Memories 8K dual voltage High Density Flash (HDFlash) or ROM with read-out protection capability. In-Application Programming and In-Circuit Programming for HDFlash devices 384 bytes RAM HDFlash endurance: 100 cycles, data retention: 40 years at 85°C
Clock, Reset And Supply Management Clock sources: crystal/ceramic resonator oscillators 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 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
4Timers 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, PWM and pulse generator modes
2 Communications Interfaces SPI synchronous serial interface SCI asynchronous serial interface
1 Analog peripheral (low current coupling) 10-bit ADC with up to 12 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
