18
Figure 1 - SMC91C95 System Block Diagram for ISA Bus with Boot PROM
TPETXP
TPETXN
TPETXDP
TPETXDN
TPERXP
TPERXN
TXP
TXN
RECP
RECN
COLP
COLN
XTAL1XTAL2EEDI
EECS
EEDO
EESK
IOS0IOS1IOS2nEN16ENEEP
AEN
BALE
RESET
nSBHE
nIORD, nIOWR,
nMEMR
D0-15
A0-19nROMnIOCS16IOCHRDYINTR0-3
4
DIAGNOSTIC
LEDs
SERIAL
EEPROM
4
20 MHz
3
SYSTEM BUS
ADDRESS
PROM
DATA
nIRQ
4
N/C
RBIAS