SCC2681T Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Lista de partido

SCC2681T

Dual asynchronous receiver/transmitter (DUART)

Philips Electronics 

Philips Semiconductors

Dual asynchronous receiver/transmitter (DUART)

Product data

SCC2681T

MNEMONIC

TxDA

TxDB

OP0

OP1

OP2

OP3

OP4

OP5

OP6

OP7

IP0

IP1

IP2

IP3

IP4

IP5

IP6

VCC

GND

n.c.

PIN

33

13

32

14

31

15

30

16

29

17

8

5

40

3

43

42

41

44

22

1, 12, 23,

34

TYPE

NAME AND FUNCTION

O Channel A Transmitter Serial Data Output: The least significant bit is transmitted first. This output is held

in the ‘mark’ condition when the transmitter is disabled, idle, or when operating in local loopback mode.

‘Mark’ is HIGH, ‘space’ is LOW.

O Channel B Transmitter Serial Data Output: The least significant bit is transmitted first. This output is

held in the ‘mark’ condition when the transmitter is disabled, idle, or when operating in local loopback

mode. ‘Mark’ is HIGH, ‘space’ is LOW.

O Output 0: General purpose output, or channel A request to send (RTSAN, active-LOW). Can be

deactivated automatically on receive or transmit.

O Output 1: General purpose output, or channel B request to send (RTSBN, active-LOW). Can be

deactivated automatically on receive or transmit.

O Output 2: General purpose output, or channel A transmitter 1× or 16× clock output, or channel A

receiver 1× clock output.

O Output 3: General purpose output, or open-drain, active-LOW counter/timer interrupt output, or channel

B transmitter 1× clock output, or channel B receiver 1× clock output.

O Output 4: General purpose output, or channel A open-drain, active-LOW, RxRDYA/FFULLA interrupt

output.

O Output 5: General purpose output, or channel B open-drain, active-LOW, RxRDYB/FFULLB interrupt

output.

O Output 6: General purpose output, or channel A open-drain, active-LOW, TxRDYA interrupt output.

O Output 7: General purpose output, or channel B open-drain, active-LOW TxRDYB interrupt output.

I Input 0: General purpose input, or channel A clear to send active-LOW input (CTSAN). Pin has an

internal VCC pull-up device supplying 1 to 4 µA of current.

I Input 1: General purpose input, or channel B clear to send active-LOW input (CTSBN). Pin has an

internal VCC pull-up device supplying 1 to 4 µA of current.

I Input 2: General purpose input, or counter/timer external clock input. Pin has an internal VCC pull-up

device supplying 1 to 4 µA of current.

I Input 3: General purpose input, or channel A transmitter external clock input (TxCA). When the external

clock is used by the transmitter, the transmitted data is clocked on the falling edge of the clock. Pin has

an internal VCC pull-up device supplying 1 to 4 µA of current.

I Input 4: General purpose input, or channel A receiver external clock input (RxCA). When the external

clock is used by the receiver, the received data is sampled on the rising edge of the clock. Pin has an

internal VCC pull-up device supplying 1 to 4 µA of current.

I Input 5: General purpose input, or channel B transmitter external clock input (TxCB). When the external

clock is used by the transmitter, the transmitted data is clocked on the falling edge of the clock. Pin has

an internal VCC pull-up device supplying 1 to 4 µA of current.

I Input 6: General purpose input, or channel B receiver external clock input (RxCB). When the external

clock is used by the receiver, the received data is sampled on the rising edge of the clock. Pin has an

internal VCC pull-up device supplying 1 to 4 µA of current.

I Power Supply: +5 V supply input.

I Ground

not connected

2004 Apr 06

5

Share Link: