W89C926PENTIC Ver la hoja de datos (PDF) - Winbond

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W89C926PENTIC

PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER

Winbond 

W89C926 PENTIC+

RESET

IREQ

(Rdy/Bsy)

TR > 500 nS

CE1,2

F/EE

sampling

FCS

MSRD

MSD0-7

MSAn

TS > 150 µS

TCE > 20 mS

TAUTO < 5 mS

MSAn

FCS

MSRD

MSD0-7

TFR > 150 nS

flash address

TFOZ > 60 nS

TFR > 150 nS

flash address

TFOZ > 60 nS

EECS/FCS Pulled Low

If EECS/ FCS is pulled low, this indicates that the configurations, Ethernet ID, and CIS are stored in

an EEPROM. In this case, after a power-on reset the PENTIC+ will load the configurations into the

LAN configuration registers and the Ethernet IDs and CIS into the higher half of SRAM memory (with

auto-mapping to ID registers and attribute memory space, respectively). Since the EEPROM used is

a 93C66, a serial EEPROM storage device, the access time is quite long and the system has to wait

for the loading sequence (refer to PCMCIA R2.1). Loading a word of EEPROM typically takes 34 µS.

The exact time for EEPROM loading depends on the length of CIS but must not exceed 10 mS.

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Publication Release Date: January 1996

Revision A1

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