UPSD3212C-40U6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

UPSD3212C-40U6

Flash programmable system devices with 8032 MCU and USB and programmable logic

STMicroelectronics 

uPSD3212A, uPSD3212C, uPSD3212CV

Figure 29. Serial Port Mode 1, Block Diagram

Timer1

Overflow

Timer2

Overflow

Write

to

SBUF

÷2

01

SMOD

TCLK

01

Internal Bus

TB8

D SQ

CL

SBUF

Zero Detector

Start

Shift Data

Tx Control

÷16

Tx Clock

TI

Send

RCLK

01

Serial

Port

Interrupt

Sample

1-to-0

Transition

Detector

÷16

Rx Clock

Start

RI

Load SBUF

Rx Control

1FFh

Shift

Rx Detector

Input Shift Register

RxD

Load

SBUF

Shift

Read

SBUF

SBUF

Internal Bus

TxD

AI06826

Figure 30. Serial Port Mode 1, Waveforms

Tx Clock

Write to SBUF

Send

Data

Shift

TxD

T1

Rx Clock

RxD

Bit Detector

Sample Times

Shift

RI

S1P1

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7 Stop Bit

÷16 Reset

Start Bit

D0

D1

D2

D3

D4

D5

D6

D7 Stop Bit

Transmit

Receive

AI06843

61/163

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