LAN91C95 Ver la hoja de datos (PDF) - SMSC -> Microchip

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LAN91C95

ISA/PCMCIA Full Duplex Single-Chip Ethernet and Modem Controller with RAM

SMSC -> Microchip 

PIN NO.

NAME

15

Speaker

Output

28

29

16

n16 Bit

Modem

110 EEPROM

Clock

109 EEPROM

Chip Select

108 EEPROM

Data Out

107 EEPROM

Data In

103, I/O Base

105, 106

9

nTransmit

LED

nTransmit

Enable

DESCRIPTION OF PIN FUNCTIONS

SYMBOL

TYPE

DESCRIPTION

SPKROUT

O4 tri-stable

with pullup

Speaker Output. This pin reflects the SPKRIN

pin when enabled by the AUDIO bit (Modem

CSR bit 3). When disabled this pin is tri-

stated.

nMPDOUT

I Schmitt

Used to control Powerdown mode. Tie to a

180K pull-up and a 0.1uF cap to ground.

Tie high when not used. This signal is used

in the RC time constant.

MFBK1

O4 with

pullup

Tie to nMPDOUT through a 5.1M resistor.

This signal is used in the RC time constant

in conjuction with the nMPDOUT pin.

nMIS16

I with pullup

Input. When low, it indicates a 16 bit modem,

otherwise the modem is 8 bit wide. Used to

determine if nIOIS16 (PCMCIA) and nIOCS16

(ISA) need to be asserted for modem cycles.

The value of this pin may change from cycle to

cycle.

EESK

O4

Output. 4µs clock used to shift data in and out

of the serial EEPROM.

EECS

O4

Output. Serial EEPROM chip select.

EEDO/

SDOUT

EEDI

IOS0-IOS2

nTXLED

O4

I with pull-

down

I with pullup

OD16

Output. Connected to the DI input of the serial

EEPROM.

Input. Connected to the DO output of the serial

EEPROM.

Input. External switches can be connected to

these lines to select between predefined

EEPROM configurations. The values of these

pins are readable. These pins are used in ISA

mode only. If in PCMCIA mode, these pins are

not used.

Internal ENDEC - Transmit LED output.

nTXEN

O162

External ENDEC - Active low Transmit Enable

output.

13

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