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ST72E331 Datasheet(PDF) 5 Page - STMicroelectronics

No. de pieza ST72E331
Descripción Electrónicos  8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72E331 Datasheet(HTML) 5 Page - STMicroelectronics

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ST72E331 ST72T331
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The
ST72T331
HCMOS
Microcontroller
Unit
(MCU) is a member of the ST7 family. The device
is based on an industry-standard 8-bit core and
features an enhanced instruction set. The device
is normally operated at a 16 MHz oscillator fre-
quency. Under software control, the ST72T331
may be placed in either Wait, Slow or Halt modes,
thus reducing power consumption. The enhanced
instruction set and addressing modes afford real
programming potential. In addition to standard
8-bit data management, the ST72T331 features
true bit manipulation, 8x8 unsigned multiplication
and indirect addressing modes on the whole mem-
ory. The device includes a low consumption and
fast start on-chip oscillator, CPU, program memo-
ry (OTP/EPROM versions), EEPROM, RAM, 44
(QFP64 and SDIP56) or 32 (QFP44 and SDIP42)
I/O lines, a Low Voltage Detector (LVD) and the
following on-chip peripherals: Analog-to-Digital
converter (ADC) with 8 (QFP64, SDIP56) or 6
(QFP44, SDIP42) multiplexed analog inputs, in-
dustry standard synchronous SPI and asynchro-
nous SCI serial interfaces, digital Watchdog, two
independent 16-bit Timers, one featuring an Exter-
nal Clock Input, and both featuring Pulse Genera-
tor capabilities, 2 Input Captures and 2 Output
Compares (only 1 Input Capture and 1 Output
Compare on Timer A).
Figure 1. ST72T331 Block Diagram
8-BIT CORE
ALU
OSCIN
OSCOUT
RESET
PORT B
TIMER B
PORT C
SPI
PORT E
SCI
PORT D
8-BIT ADC
WATCHDOG
PB0 -> PB7
PC0 -> PC7
PE0 -> PE7
PD0 -> PD7
OSC
Internal
CLOCK
CONTROL
RAM
(384 - 512 Bytes)
PORT F
PF0 -> PF2,4,6,7
TIMER A
PORT A
PA0 -> PA7
VSSA
VDDA
(6 bits for ST72T331N)
(6 bits)
EEPROM
(256 Bytes)
AND LVD
(2 bits for ST72T331J)
(8 bits for ST72T331N)
(6 bits for ST72T331J)
(8 bits for ST72T331N)
(5 bits for ST72T331J)
(8 bits)
(8 bits for ST72T331N)
(5 bits for ST72T331J)
VSS
VDD
POWER
SUPPLY
PROGRAM
(8 - 16K Bytes)
MEMORY
5


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