SMC91C95 Ver la hoja de datos (PDF) - SMSC -> Microchip

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SMC91C95

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

SMSC -> Microchip 

PIN NO.

NAME

nInterrupt

Request

91

Interrupt 1

92

Interrupt 2

nStatus

Changed

93

Interrupt 3

85

nI/O 16

DESCRIPTION OF PIN FUNCTIONS

SYMBOL

TYPE

DESCRIPTION

nIREQ

PCMCIA - Active low interrupt request output.

Pin acts as a Ready pin during power-up. The

pin should be pulled low within 10us of the

application of the VCC or Reset (which ever

occurs later). It remains low(0) until the CIS is

loaded in the Internal SRAM. The high(1)

state indicates to the host controller that the

device is ready.

INTR1

O24

ISA - Output. Active high interrupt signal. The

interrupt line selection is determined by the

value of INT SEL1-0 bits in the Configuration

Register. This interrupt is tri-stated when not

selected.

nINPACK

PCMCIA - Output asserted to acknowledge

read cycles for an enabled function.

INTR2

O24

ISA - Output. Active high interrupt signal. The

interrupt line selection is determined by the

value of INT SEL1-0 bits in the Configuration

Register. This interrupt is tri-stated when not

selected.

nSTSCHG

PCMCIA - Status changed bit. Depending on

the setting of the RingEn bit (Modem CCSR),

this pin either reflects the ringing status (ExCA

mode) or the state of the Modem Changed bit.

The ringing status is obtained by stretching

the MRINGIN to convert a 20Hz toggle rate to

a constant level.

INTR3

O24

ISA - Output. Active high interrupt signal. The

interrupt line selection is determined by the

value of INT SEL1-0 bits in the Configuration

Register. This interrupt is tri-stated when not

selected.

nIOCS16

OD24

ISA - Active low output asserted in 16 bit

mode when AEN is low and A4-A15 decode

to the SMC91C95 address programmed into

the high byte of the Base Address Register.

11

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