ST72344S2 datasheet(15/247 Pages) STMICROELECTRONICS

15 / 247 page

ST72344xx, ST2345xx

Description

Doc ID 12321 Rev 6

15/247

Description

The ST7234x devices are members of the ST7 microcontroller family. Table 2 gives the

available part numbers and details on the devices. All devices are based on a common

industry-standard 8-bit core, featuring an enhanced instruction set.

They feature single-voltage Flash memory with byte-by-byte in-circuit programming (ICP)

and in-application programming (IAP) capabilities.

Under software control, all devices can be placed in Wait, Slow, Auto-wakeup from Halt,

Active-halt or Halt mode, reducing the power consumption when the application is in idle or

stand-by state.

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 microcontrollers

feature true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes.

The devices feature an on-chip debug module (DM) to support in-circuit debugging (ICD).

For a description of the DM registers, refer to the ST7 ICC Protocol Reference Manual.

Figure 1.

General block diagram

8-BIT CORE

ALU

OSC1

CONTROL

PROGRAM

(16 K - 32 KBytes)

VDD

RESET

PORT F

(6-bits)

TIMER A

BEEP

PORT A

RAM

(512- 1024 Bytes)

PORT C

10-BIT ADC

VAREF

VSSA

PORT B

(5-bits)

PWM ART

TIMER B

(5-bits)

PORT D

(6-bits)

SPI

(8-bits)

VSS

WATCHDOG

CLOCK CONTROL

LVD

OSC2

MEMORY

MCC/RTC/BEEP

AVD

I2CMMS

PORT E

(2-bits)

SCI

I2C3SNS

INTERNAL RC

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