XR16C850 查看數據表（PDF） - Exar Corporation

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XR16C850

UART with 128-byte FIFO’s FIFO Counters and Half-duplex Control

Exar Corporation 

XR16C850

D0-D7

-IOR

-IOW

A0-A9

-AEN

S1, S2,S3

-LPT1

-LPT2

IRQA

IRQB

IRQC

Transmit

FIFO

Registers

Flow

Control

Logic

Receive

FIFO

Registers

Flow

Control

Logic

Transmit

Shift

TX

Register

Ir

Encoder

Receive

Shift

RX

Register

Ir

Decoder

Clock

&

Baud Rate

Generator

Modem

Control

Logic

-DTR,-RTS

-CTS

-RI

-CD

-DSR

GND

Figure 3. BLOCK DIAGRAM (PC MODE)

Rev. 1.20

4

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