ST72321J9 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72321J9

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE

STMicroelectronics 

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ST72321

SERIAL COMMUNICATIONS INTERFACE (Cont’d)

Figure 60. SCI Block Diagram

TDO

RDI

Write

Transmit Data Register (TDR)

Read

(DATA REGISTER) DR

Received Data Register (RDR)

Transmit Shift Register

Received Shift Register

CR1

R8 T8 SCID M WAKE PCE PS PIE

TRANSMIT

CONTROL

WAKE

UP

UNIT

CR2

TIE TCIE RIE ILIE TE RE RWU SBK

RECEIVER

CONTROL

RECEIVER

CLOCK

TDRE TC RDRF IDLE OR

NF FE

SR

PE

SCI

INTERRUPT

CONTROL

TRANSMITTER

CLOCK

fCPU

/16

/PR

TRANSMITTER RATE

CONTROL

BRR

SCP1SCP0 SCT2 SCT1 SCT0 SCR2 SCR1SCR0

RECEIVER RATE

CONTROL

CONVENTIONAL BAUD RATE GENERATOR

100/185

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