Features
Memories
■ 1 to 2 Kbytes single voltage Flash program
memory with readout protection, in-circuit and
in-application programming (ICP and IAP), 10k
write/erase cycles guaranteed, data retention
20 years at 55°C
■ 128 bytes RAM
■ Up to 128 bytes data EEPROM, 300k
write/erase cycles guaranteed, data retention
20 years at 55°C
Clock, reset and supply management
■ Internal low voltage supervisor (LVD) for
reliable power-on/-off start-up procedures
■ Clock sources: Internal trimmable 8 MHz RC
oscillator, internal low power, low frequency
RC oscillator or external clock
■ 5 power saving modes: Halt, Auto Wake-up
from Halt, Active Halt, Wait and Slow
Interrupt management
■ 11 interrupt vectors plus TRAP and RESET
■ 5 external interrupt lines (on 5 vectors)
I/O ports
■ 5 multifunctional bidirectional I/O lines
■ 1 additional output line
■ 6 alternate function lines
■ 5 high sink outputs
2 timers
■ One 8-bit Lite timer (LT) with prescaler
including: Watchdog, 1 real-time base and 1
input capture
■ One 12-bit auto-reload timer (AT) with output
compare function and PWM
A/D converter
■ 10-bit resolution for 0 to VDD
■ 5 input channels
Instruction set
■ 8-bit data manipulation
■ 63 basic instructions with illegal opcode
detection
■ 17 main addressing modes
■ 8 x 8 unsigned multiply instruction
Development tools
■ Full hardware/software development package
■ Debug module

Description
The ST7LUxx devices are members of the ST7 microcontroller family designed for midrange
automotive applications running from 3 to 5.5V.
All ST7 devices are based on a common industry-standard 8-bit core, featuring an
enhanced instruction set and are available with Flash or preprogramed memory. The ST7
family architecture offers both power and flexibility to software developers, enabling the
design of highly efficient and compact application code.
The on-chip peripherals include an A/D converter, a Lite timer and and an auto-reload timer.
For power economy, the microcontroller can switch dynamically into Halt, Auto Wake-up
from Halt, Active Halt, Wait, or Slow mode when the application is in idle or standby state.
The devices feature an on-chip Debug Module (DM) to support in-circuit debugging (ICD).
For a description of the DM registers, refer to the ST7 ICC Protocol Reference Manual.
Typical applications include:
● all types of car body applications such as window lift, DC motor control, sunroof
● Remote keyless entry (RKE)
● Safety microcontroller (sub-MCU)