ST72E121J4D0 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72E121J4D0

8-BIT MCU WITH 8 TO 16K OTP/EPROM, 384 TO 512 BYTES RAM, WDG, SCI, SPI AND 2 TIMERS

STMicroelectronics 

SERIAL COMMUNICATIONS INTERFACE (Cont’d)

Figure 34. SCI Baud Rate and Extended Prescaler Block Diagram

ST72E121 ST72T121

EXTE NDED PRESCALER TRANSMITTE R RATE CONTROL

ETPR

EXTE NDED TRANS MITTER PRESCALE R REGISTER

ERPR

EXTE NDED RECEIVER PRESCALER REGISTER

fCPU

/16

EXTE NDED PRESCALER RECEIVER RATE CONTROL

EXTENDED PRESCALER

/2

/PR

TRANSMIT TER RATE

CONTR OL

BRR

SCP1SCP0SCT2 SCT1 SCT0 SCR2 SCR1SCR0

RECEIVER RATE

CONTROL

CONVENTIONAL BAUD RATE GENERATOR

TRANSMI TTER

CLOCK

RECE IVER

CLOCK

55/92

55

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