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Número de pieza

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W83877F

WINBOND I/O

Winbond 

W83877F

1.1 Host Interface, continued

SYMBOL PIN

IRQ_ A /

96

GIO1

IRQ_ B /

92

GIO0

IRQ_C

44

IRQ_D

37

IRQ_E

23

IRQ_F

99

XTAL1

7

XTAL2

8

I/O

OUT12t

I/O12t

OUT12t

I/O12t

OUT12t

OUT12t

OUT12t

OUT12t

INc

OUT8t

FUNCTION

When CR16 Bit 4 (GOIQSEL) = 0: Interrupt request signal A;

When CR16 Bit 4 (GOIQSEL) = 1: General Purpose I/O port 1.

When CR16 Bit 4 (GOIQSEL) = 0: Interrupt request signal B;

When CR16 Bit 4 (GOIQSEL) = 1: General Purpose I/O port 0.

Interrupt request signal C

Interrupt request signal D

Interrupt request signal E

Interrupt request signal F

XTAL oscillator input

XTAL oscillator output

1.2 Serial Port Interface

SYMBOL PIN

I/O

CTSA

CTSB

34

INt

47

DSRA

DSRB

33

INt

48

DCDA

DCDB

32

INt

49

RIA

31

INt

RIB

50

SINA

30

INt

SINB/IRRX1 42

SOUTA/

38

I/O8t

PIRIDE

FUNCTION

Clear To Send is the modem control input.

The function of these pins can be tested by reading Bit 4 of the

handshake status register.

Data Set Ready. An active low indicates the modem or data set

is ready to establish a communication link and transfer data to

the UART.

Data Carrier Detect. An active low indicates the modem or data

set has detected a data carrier.

Ring Indicator. An active low indicates that a ring signal is being

received by the modem or data set.

Serial Input. Used to receive serial data from the communication

link.

UART A Serial Output. Used to transmit serial data out to the

communication link.

During power-on reset, this pin is pulled up internally and is

defined as PIRIDE, which provides the power-on value for CR16

bit 1 (IRIDE). A 47 kΩ is recommended when intends to pull

down at power-on reset.

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