ST72321
64/44-PIN 8-BIT MCU WITH 32 TO 60K FLASH/ROM, ADC,
FIVE TIMERS, SPI, SCI, I2C INTERFACE
■ Memories
– 32K to 60K dual voltage High Density Flash
(HDFlash) or ROM with read-out protection
capability. In-Application Programming and
In-Circuit Programming for HDFlash devices
– 1K to 2K RAM
– HDFlash endurance: 100 cycles, data reten-
tion: 20 years at 55°C
TQFP64
14 x 14
■ Clock, Reset And Supply Management
– Enhanced low voltage supervisor (LVD) for
main supply and auxiliary voltage detector
(AVD) with interrupt capability
– Clock sources: crystal/ceramic resonator os-
cillators, internal RC oscillator, clock security
system and bypass for external clock
TQFP64
10 x 10
TQFP44
10 x 10
– PLL for 2x frequency multiplication
– Four Power Saving Modes: Halt, Active-Halt,
time base interrupt, external clock with event
detector
■ 3 Communications Interfaces
Wait and Slow
■ Interrupt Management
– Nested interrupt controller
– SPI synchronous serial interface
– SCI asynchronous serial interface
– 14 interrupt vectors plus TRAP and RESET
– Top Level Interrupt (TLI) pin on 64-pin devices
– 15 external interrupt lines (on 4 vectors)
■ Up to 48 I/O Ports
2
– I C multimaster interface
■ 1 Analog peripheral
– 10-bit ADC with up to 16 input ports
– 48/32 multifunctional bidirectional I/O lines
– 34/22 alternate function lines
– 16/12 high sink outputs
■ Instruction Set
– 8-bit Data Manipulation
– 63 Basic Instructions
– 17 main Addressing Modes
– 8 x 8 Unsigned Multiply Instruction
■ 5 Timers
– Main Clock Controller with: Real time base,
Beep and Clock-out capabilities
– Configurable watchdog timer
– Two 16-bit timers with: 2 input captures, 2 out-
put compares, external clock input on one tim-
er, PWM and pulse generator modes
■ Development Tools
– Full hardware/software development package
– In-Circuit Testing capability
– 8-bit PWM Auto-reload timer with: 2 input cap-
tures, 4 PWM outputs, output compare and
Device Summary
ST72F321
(R/AR/J)9
ST72F321
(R/AR/J)7
ST72F321
(R/AR)6
ST72321
(R/AR/J)9
ST72321
(R/AR/J)7
ST72321
(R/AR)6
Features
Program memory - bytes
RAM (stack) - bytes
Operating Voltage
Temp. Range
Flash 60K
2048 (256)
Flash 48K
1536 (256)
Flash 32K
1024 (256)
ROM 60K
ROM 48K
ROM 32K
2048 (256)
1536 (256)
1024 (256)
3.8V to 5.5V
up to -40°C to +125°C
TQFP64 14x14 (R), TQFP64 10x10 (AR), TQFP44 10x10 (J)
Package
Rev. 1.10
October 2004
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