IS80LV51 Datasheet, PDF(21/43 Page) Integrated Silicon Solution, Inc – CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER

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IS80LV51 Datasheet, PDF (21/43 Pages) Integrated Silicon Solution, Inc – CMOS SINGLE CHIP LOW VOLTAGE 8-BIT MICROCONTROLLER

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IS80LV51

IS80LV31

ISSI Â®

IS80LV51/31 INTERNAL BUS

WRITE

SBUF

DSQ

SBUF

ZERO DETECTOR

SHIFT

RXD

P3.0 ALT

OUTPUT

FUNCTION

REN

START

TX CONTROL

TX CLOCK

SHIFT

SEND

SERIAL

PORT

INTERRUPT

RX CLOCK RI

RECEIVE

START

RX CONTROL

SHIFT

11111110

INPUT SHIFT REG.

LOAD

SBUF

SHIFT

CLOCK

TXD

P3.1 ALT

OUTPUT

FUNCTION

RXD

P3.0 ALT

INPUT

FUNCTION

READ

SBUF

IS80LV51/31 INTERNAL BUS

S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1

ALE

SEND

SHIFT

WRITE TO SBUF

S6P2

RXD (DOUT)

TRANSMIT

TXD (SHIFT CLOCK)

S3P1

S6P1

WRITE TO SCON (CLEAR RI)

RECEIVE

SHIFT

RXD (DIN)

S5P2

TXD (SHIFT CLOCK)

RECEIVE

Figure 12. Serial Port Mode 0

Integrated Silicon Solution, Inc.

ADVANCE INFORMATION MC018-0A

10/01/98

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