COM81C17LJP 데이터 시트보기 (PDF) - SMSC -> Microchip

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COM81C17LJP

Twenty Pin UART (TPUART)

SMSC -> Microchip 

D0-D7

nCS

nRD

nWR

RS

DATA

BUS

TRANS

READ

WRITE

DECODE

LOGIC

nINT

VCC

GND

MASK

REGISTER

& LOGIC

CONTROL

REGISTER

TRANSMIT

BUFFER

TRANSMIT

TX

SHIFT REGISTER

MODE

REGISTER

TRANSMIT

CONTROL

BAUD

RATE

SELECT

REGISTER

BAUD

RATE

GENERATOR

STATUS

REGISTER

RECEIVE

CONTROL

RECEIVE

SHIFT REGISTER

RECEIVE

BUFFER

CLOCK

RX

FIGURE 2 – COM81C17 BLOCK DIAGRAM

1800 OHM

560 OHM

7404

220 OHM

7404

7404

7404

220 OHM

30 pF

5.0688 MHz

FIGURE 2A – 5.0688 MHz CRYSTAL OSCILLATOR CIRCUIT

4

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