SMC Networks SMC91C95 Product Manual page 11

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
nIREQ
INTR1 O24
nINPACK
INTR2 O24
nSTSCHG
INTR3 O24
nIOCS16 OD24
11
DESCRIPTION
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.
state indicates to the host controller that the
device is ready.
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.
PCMCIA - Output asserted to acknowledge
read cycles for an enabled function.
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.
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.
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.
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.
The high(1)