ST72334xx-Auto,
ST72314xx-Auto, ST72124Jx-Auto
8-bit MCU for automotive with single voltage Flash/ROM memory,
ADC, 16-bit timers, SPI, SCI interfaces
■ Memories
– 8 or 16 Kbyte Program memory (ROM or sin-
gle voltage Flash) with readout 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
TQFP64
14 x 14
TQFP44
10 x 10
– Enhanced low voltage supply supervisor with
3 programmable levels
– Clock sources: crystal/ceramic resonator os-
cillators 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
■ 2 Communications Interfaces
– SPI synchronous serial interface
– SCI asynchronous serial interface (LIN com-
patible)
■ 1 Analog Peripheral
– 8-bit ADC with 8 input channels (6 only on
– 44 or 32 multifunctional bidirectional I/O lines:
– 21 or 19 alternate function lines
– 12 or 8 high sink outputs
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
■ 4 Timers
– Configurable watchdog timer
– Real-time 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
■ Development Tools
– Full hardware/software development package
Device Summary
ST72124J2 ST72314J2 ST72314J4 ST72314N2 ST72314N4 ST72334J2 ST72334J4 ST72334N2 ST72334N4
Features
-Auto
-Auto
-Auto
-Auto
-Auto
-Auto
-Auto
-Auto
-Auto
8 Kbytes
16 Kbytes 8 Kbytes
16 Kbytes 8 Kbytes 16 Kbytes 8 Kbytes
Flash/ROM
16 Kbytes
Prog. memory
512 (256) 384 (256) 512 (256) 384 (256) 512 (256) 384 (256) 512 (256)
RAM (stack)
EEPROM
384 (256) bytes
bytes
bytes
bytes
bytes
bytes
bytes
bytes
-
256 bytes
Watchdog, Two 16-bit Timers, SPI, SCI
Peripherals
-
ADC
3.2V to 5.5V
Up to 8 MHz (with up to 16 MHz oscillator)
Oper. Supply
CPU Freq.
Oper. Temp.
Packages
-40°C to +85°C / -40°C to +125C° Flash or ROM (-40°C to +105°C ROM only)
TQFP44 TQFP64 TQFP44
TQFP64
Rev. 1
October 2007
1/150
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