ST72E331 datasheet(59/107 Pages) STMICROELECTRONICS

Part #	ST72E331

Description	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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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST72E331 ST72T331

SERIAL COMMUNICATIONS INTERFACE (Cont’d)

Figure 37. SCI Block Diagram

WAKE

UP

UNIT

RECEIVER

CONTROL

SR

TRANSMIT

CONTROL

TDRE TC RDRF IDLE OR

NF

FE

-

SCI

CONTROL

INTERRUPT

CR1

R8

T8

-

M

WAKE

-

--

Received Data Register (RDR)

Received Shift Register

Read

Transmit Data Register (TDR)

Transmit Shift Register

Write

RDI

TDO

(DATA REGISTER) DR

TRANSMITTER

CLOCK

RECEIVER

CLOCK

RECEIVER RATE

TRANSMITTER RATE

BRR

SCP1

fCPU

CONTROL

SCP0 SCT2 SCT1 SCT0 SCR2 SCR1SCR0

/2

/PR

/16

CONVENTIONAL BAUD RATE GENERATOR

SBK

RWU

RE

TE

ILIE

RIE

TCIE

TIE

CR2

59

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ST72E331 Datasheet(PDF) 59 Page - STMicroelectronics

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