ST72321AR7 STMicroelectronics, ST72321AR7 Datasheet - Page 7

• Manufacturer Part Number: ST72321AR7
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321AR7

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt,Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

1 DESCRIPTION
The ST72F321 Flash and ST72321 ROM devices
are members of the ST7 microcontroller family de-
signed for mid-range applications.
All devices are based on a common industry-
standard 8-bit core, featuring an enhanced instruc-
tion set and are available with Flash or ROM pro-
gram memory. The ST7 family architecture offers
both power and flexibility to software developers,
enabling the design of highly efficient and compact
application code.
Figure 1. Device Block Diagram
RESET
OSC1
OSC2
V
(8-bits)
(8-bits)
PF7:0
V
(8-bits)
PD7:0
PE7:0
AREF
EVD
V
V
V
TLI
SSA
DD
SS
PP
MCC/RTC/BEEP
8-BIT CORE
10-BIT ADC
CONTROL
TIMER A
PORT E
PORT D
PORT F
BEEP
OSC
ALU
LVD
AVD
SCI
The on-chip peripherals include an A/D converter,
a PWM Autoreload timer, 2 general purpose tim-
ers, I
For power economy, microcontroller can switch
dynamically into WAIT, SLOW, ACTIVE-HALT or
HALT mode when the application is in idle or
stand-by state.
Typical applications are consumer, home, office
and industrial products.
Related Documentation
AN1131: Migrating applications from ST72511/
311/314 to ST72521/321/324
2
C bus, SPI interface and an SCI interface.
ST72321Rx ST72321ARx ST72321Jx
(1024 - 2048 Bytes)
(32K - 60K Bytes)
WATCHDOG
PROGRAM
PWM ART
MEMORY
TIMER B
PORT A
PORT B
PORT C
RAM
I2C
SPI
(8-bits)
(8-bits)
(8-bits)
PA7:0
PB7:0
PC7:0
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