W89C926 Datasheet, PDF (20/48 Pages) Winbond – PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER

W89C926 PENTIC+
RESET
IREQ
(Rdy/Bsy)
CE1,2
F/EE
sampling
EECS, RCS
MSWR
MSD0-7
MSAn
MSAn
EECS
MSD0-7
RCS
MSWR
TR > 500 nS
TS > 150 µS
TCE > 20 mS
TAUTO < 10 mS
TEER > 32 µS
TEEOZ > 0.5 µS
TSW > 100 nS
even address
TSOZ > 20 nS
TSOZ > 20 nS
TSW > 100 nS
odd address
MSD0-2 16 bit EEload
low byte
high byte
EEPROM Contents Load Back
When an EEPROM is used to store CIS, the PENTIC+ allows the contents of the EEPROM to be
modified by means of the following sequence:
write (EEAR, EOS = 1 EW/ER = 1)
write (ADR, address);
write (ADR, word_data);
wait ( );
repeat (
read(EEAR, EOS);
) until (EOS = 0);
/* The entire sequence should be consecutive or the process will be aborted. */
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