ST72F321 STMICROELECTRONICS [STMicroelectronics], ST72F321 Datasheet - Page 7

• Manufacturer Part Number: ST72F321
• Description: 64/44-PIN 8-BIT MCU WITH 32 TO 60K FLASH/ROM, ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

1 INTRODUCTION
The ST72F321 and ST72321 devices are mem-
bers of the ST7 microcontroller family 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.
Under software control, all devices can be placed
in WAIT, SLOW, ACTIVE-HALT or HALT mode,
reducing power consumption when the application
is in idle or stand-by state.
Figure 1. Device Block Diagram
RESET
OSC1
OSC2
V
(8-bits)
(8-bits)
PF7:0
V
(8-bits)
PD7:0
AREF
PE7:0
EVD
V
V
V
SSA
TLI
DD
SS
PP
MCC/RTC/BEEP
8-BIT CORE
10-BIT ADC
CONTROL
TIMER A
PORT D
PORT F
PORT E
BEEP
OSC
LVD
ALU
AVD
SCI
The enhanced instruction set and addressing
modes of the ST7 offer both power and flexibility to
software developers, enabling the design of highly
efficient and compact application code. In addition
to standard 8-bit data management, all ST7 micro-
controllers feature true bit manipulation, 8x8 un-
signed multiplication and indirect addressing
modes.
Related Documentation
AN1131: Migrating applications from ST72511/
311/314 to ST72521/321/324
(512 - 2048 Bytes)
(16K - 60K Bytes)
WATCHDOG
PROGRAM
PWM ART
MEMORY
TIMER B
PORT A
PORT B
PORT C
RAM
I2C
SPI
(8-bits)
(8-bits)
(8-bits)
PC7:0
PA7:0
PB7:0
ST72321
7/189