Description
ST7LITE20F2, ST7LITE25F2 and ST7LITE29F2 are referred to as ST7LITE2. The ST7LITE2 is a member of the ST7 microcontroller family. All ST7 devices are based on a common industry-standard 8-bit core, featuring an enhanced instruction set.
The ST7LITE2 features FLASH memory with byte-by-byte In-Circuit Programming (ICP) and In-Application Programming (IAP) capability.

Features
■ Memories
   – 8 Kbytes single voltage Flash Program memory with Read-out protection
   – In-circuit programming and in-application programming (ICP and IAP)
   – 10K write/erase cycles guaranteed
   – Data retention: 20 years at 55 °C
   – Temperature range: -40°C to 105°C
   – 384 bytes RAM.
■ Clock, reset and supply management
   – Enhanced reset system
   – Enhanced low voltage supervisor (LVD) for main supply and an auxiliary voltage detector (AVD) with interrupt capability for implementing safe power-down procedures
   – Clock sources: internal 1% RC oscillator, crystal/ceramic resonator or external clock
   – Internal 32-MHz input clock for auto-reload timer
   – Optional x4 or x8 PLL for 4 or 8 MHz internal clock
   – Five power saving modes: Halt, Active-halt, Wait and Slow, Auto-wakeup from Halt.
■ I/O ports
   – Up to 15 multifunctional bidirectional I/O lines
   – 7 high sink outputs.
■ 4 timers
   – Configurable watchdog timer
   – Two 8-bit Lite timers with prescaler
   – 1 real-time base and 1 input capture
   – One 12-bit auto-reload timer with 4 PWM outputs, input capture and output compare functions.
■ 1 communication interface
   – SPI synchronous serial interface.
■ Interrupt management
   – 10 interrupt vectors plus TRAP and RESET
   – 15 external interrupt lines (on 4 vectors).
■ A/D converter
   – 7 input channels
   – Fixed gain op-amp
   – 13-bit resolution for 0 to 430 mV (@ 5 V VDD)
   – 10-bit resolution for 430 mV to 5 V (@ 5 V VDD).
■ Instruction set
   – 8-bit data manipulation
   – 63 basic instructions with illegal opcode detection
   – 17 main addressing modes
   – 8 x 8 unsigned multiply instructions.
■ Development tools
   – Full hardware/software development package
   – DM (debug module)