The ST72334J/N, ST72314J/N and ST72124J devices are members of the ST7 microcontroller family. They can be grouped as follows:ST72334J/N devices are designed for mid-range applications with Data EEPROM, ADC, SPI and SCI interface capabilities. ST72314J/N devices target the same range of applications but without Data EEPROM.ST72124J devices are for applications that do not need Data EEPROM and the ADC peripheral. All devices are based on a common industry-standard 8-bit core, featuring an enhanced instruction set. The ST72C334J/N, ST72C314J/N and ST72C124J versions feature single-voltage FLASH memory with byte-by-byte In-Situ Programming (ISP) capability. 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 standby 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.For easy reference, all parametric data are located in Section 16 on page 107.
Memories 8K or 16K Program memory (ROM or single voltage FLASH) with read-out protection and in-situ programming (remote ISP) 256 bytes EEPROM Data memory (with read-out protection option in ROM devices) 384 or 512 bytes RAM
Clock, Reset and Supply Management Enhanced reset system Enhanced low voltage supply supervisor with 3 programmable levels Clock sources: crystal/ceramic resonator oscillators or RC oscillators, external clock, backup Clock Security System 4 Power Saving Modes: Halt, Active-Halt, Wait and Slow Beep and clock-out capabilities
Interrupt Management 10 interrupt vectors plus TRAP and RESET 15 external interrupt lines (4 vectors)
44 or 32 I/O Ports 44 or 32 multifunctional bidirectional I/O lines: 21 or 19 alternate function lines 12 or 8 high sink outputs
4 Timers Configurable watchdog timer Realtime base Two 16-bit timers with: 2 input captures (only one on timer A), 2 output compares (only one on timer A), External clock input on timer A, PWM and Pulse generator modes
2 Communications Interfaces SPI synchronous serial interface SCI asynchronous serial interface (LIN compatible)
1 Analog Peripheral 8-bit ADC with 8 input channels (6 only on ST72334Jx, not available on ST72124J2)
Instruction Set 8-bit data manipulation 63 basic instructions 17 main addressing modes 8 x 8 unsigned multiply instruction True bit manipulation
Development Tools Full hardware/software development package
