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91C94 Datasheet(PDF) 11 Page - SMSC Corporation |
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91C94 Datasheet(HTML) 11 Page - SMSC Corporation |
11 / 120 page 11 PIN NUMBER QFP VTQFP/ TQFP NAME SYMBOL BUFFER TYPE DESCRIPTION 25 23 nI/O 16 nIOCS16/ nIOIS16 OD24 ISA - Active low output asserted in 16 bit mode when AEN is low and A4-A15 decode to the LAN91C94 address programmed into the high byte of the Base Address Register PCMCIA - Active low output asserted whenever the LAN91C94 is in 16 bit mode, COR0 bit is high, and REG* is low 51 49 nI/O Read nIORD IS with pullup Input - Active low read strobe to access the LAN91C94 IO space 52 50 nIOWR IS with pullup Input - Active low write strobe to access the LAN91C94 IO space 53 51 nMEMR/ nOE IS with pullup ISA - Active low signal used by the host processor to read from the external ROM. PCMCIA - Output Enable input used to read from the COR, CSR, and attribute memory 7 5 EEPROM Clock EESK O4 Output - 4usec clock used to shift data in and out of a serial EEPROM 6 4 EEPROM Select EECS O4 Output - Serial EEPROM chip select 4 2 EEPROM Data Out EEDO/ SDOUT O4 Output - Connected to the DI input of the serial EEPROM 5 3 EEPROM Data In EEDI I with pull- down Input - Connected to the DO output of the serial EEPROM 98, 99,1 96,97 99 I/O Base IOS0-2 I with pullup Input - External switches can be connected to these lines to select between predefined EEPROM configurations. The values of these pins are readable 72 70 nTransmit Led/ nTransmit Enable nTXLED/ nTXEN OD16 O162 INTERNAL ENDEC - Transmit LED output EXTERNAL ENDEC - Active low Transmit Enable output |
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Similar Description - 91C94 |
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