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 

Table 2 - Bus Transactions In PCMCIA Mode

A0 nCE1 nCE2

D0-D7

D8-D15

8 BIT MODE

0

0

X

even byte

-

((IOis8=1) + (nEN16=1).(16BIT=0))

1

0

X

odd byte

-

X

1

X

NO CYCLE

16 BIT MODE

0

0

0

even byte

odd byte

otherwise

0

0

1

even byte

-

1

0

1

odd byte

X

1

0

-

odd byte

X

1

1

NO CYCLE

16BIT = CONFIGURATION REGISTER bit 7

IOis8 = ECSR register bit 5

nEN16 = pin nEN16

For the modem function, the transactions are similarxcept that the modem is assumed to be 8 bit wide

unless (IOis8=0) and (nMIS16=0).

Note: The IOis8 value should be identical in MCSR and ECSR if both functions are enabled.

8 Bit mode = (IOis8=1)+(nMIS16=1)

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