ST72321B STMICROELECTRONICS [STMicroelectronics], ST72321B Datasheet - Page 7

• Manufacturer Part Number: ST72321B
• Description: 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

1 DESCRIPTION
The ST72F321B Flash and ST72321B ROM de-
vices are members of the ST7 microcontroller fam-
ily designed 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
SSA
TLI
DD
SS
PP
MCC/RTC/BEEP
8-BIT CORE
10-BIT ADC
CONTROL
TIMER A
PORT E
PORT D
PORT F
BEEP
OSC
LVD
ALU
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.
(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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