LPC47N267(2000) Ver la hoja de datos (PDF) - SMSC -> Microchip

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LPC47N267
(Rev.:2000)

100 Pin LPC Notebook I/O with X-Bus Interface

SMSC -> Microchip 

STQFP PIN #

90

92

91

94

95

96

61

62

63

66

NAME

SYMBOL

BUFFER

TYPE PER

FUNCTION1

DESCRIPTION

Ring

Indicator 1

nRI1

Ring

Indicator 2

nRI2

I

Active low Ring Indicator inputs for the serial port.

Handshake signal which notifies the UART that the

telephone ring signal is detected by the modem.

The CPU can monitor the status of nRI signal by

reading bit 6 of Modem Status Register (MSR). A

nRI signal state change from low to high after the

I

last MSR read will set MSR bit 2 to a 1. If bit 3 of

Interrupt Enable Register is set, the interrupt is

generated when nRI changes state.

Note: Bit 6 of MSR is the complement of nRI.

Data Carrier nDCD1

Detect 1

Data Carrier nDCD2

Detect 2

I

Active low Data Carrier Detect inputs for the serial

port. Handshake signal which notifies the UART

that carrier signal is detected by the modem. The

CPU can monitor the status of nDCD signal by

reading bit 7 of Modem Status Register (MSR). A

I

nDCD signal state change from low to high after

the last MSR read will set MSR bit 3 to a 1. If bit 3

of Interrupt Enable Register is set, the interrupt is

generated when nDCD changes state.

Note: Bit 7 of MSR is the complement of nDCD.

Receive Data RXD2

2

IS

Receiver serial data input for port 2. IR Receive

Data.

Transmit

Data 2

TXD2

O12

Transmit serial data output for port 2. IR transmit

data.

INFRARED INTERFACE (3)

IR Receive IRRX2

IS

IR Receive.

IR Transmit IRTX2

O12

IR Transmit.

IR Mode/

IRMODE/

O6/

IR mode.

IR Receive 3 IRRX3

IS

IR Receive 3.

PARALLEL PORT INTERFACE (17) (NOTE 3)

Initiate

Output/

nINIT/

(OD14/OP14) This output is bit 2 of the printer control register.

/

This is used to initiate the printer when low.

Refer to Parallel Port description for use of this

pin in ECP and EPP mode.

nDIR

FDC Direction

Control

OD14

See FDC Pin definition.

(Note 4)

67

Printer Select nSLCTIN/

(OD14/OP14) This active low output selects the printer. This is

Input/

/

the complement of bit 3 of the Printer Control

Register.

Refer to Parallel Port description for use of this pin

in ECP and EPP mode.

FDC Step

Pulse (Note

4)

nSTEP

68

Port Data 0/ PD0/

OD14

IOP14/

See FDC Pin definition.

Port Data 0

FDC Index nINDEX

69

Port Data 1/ PD1/

IS

IOP14/

See FDC Pin definition.

Port Data 1

FDC Track 0 nTRK0

IS

See FDC Pin definition.

SMSC DS – LPC47N267

Page 10

Rev. 10/23/2000

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