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 

Table 2 - Bus Transactions in PCMCIA Mode

A0

8 BIT MODE

0

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

1

X

16 BIT MODE

0

otherwise

0

1

X

X

nCE1

0

0

1

0

0

0

1

1

nCE2

X

X

X

0

1

1

0

1

D0-D7

even byte

D8-D15

-

odd byte

-

NO CYCLE

even byte

odd byte

even byte

-

odd byte

-

odd byte

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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