LAN91C95 Ver la hoja de datos (PDF) - SMSC -> Microchip
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LAN91C95 Datasheet PDF : 144 Pages
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PIN NO.
NAME
92
Interrupt 2
nStatus
Changed
93
Interrupt 3
85
nI/O16
88
nI/O Read
87
nI/O Write
86
nMemory
Read
nOutput
Enable
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
TYPE
DESCRIPTION
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 LAN91C95 address programmed into the
high byte of the Base Address Register.
nIOIS16
PCMCIA - Active low output asserted
whenever the LAN91C95 is in 16 bit mode,
and “Enable Function” bit in the ECOR register
is high, nREG is low and A4-A15 decode to
the LAN address specified in I/O Base
Registers 0 and 1 in PCMCIA attribute space.
nIORD
IS with
pullup
Input. Active low read strobe used to access
the LAN91C95 IO space.
nIOWR
IS with
pullup
Input. Active low write strobe used to access
the LAN91C95 IO space.
nMEMR
IS with
pullup
ISA - Active low signal used by the host
processor to read from the external ROM.
nOE
PCMCIA - Output Enable input used to read
from the COR, CSR and attribute memory.
11
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