W89C940 Datasheet, PDF (32/61 Pages) Winbond – ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE)

W89C940
TEST MODE SETTING AND DEFINITION
W89C940 provide three test modes they are 90 test mode, TP test mode, and AUI test mode. The system reset
signal is fed into 400ns low glitch eater and the output is RST_I. At 400 nsec RST_I asserted period, the three
pins (EECS,BPCSB,RCSB) output (0,1,1). After RST_I deasserted, the three pins become input pins and
sample at 90nsec. The sampled value (*1,*2,*3) determine the test mode. The timing and test mode type is
shown as following.
PCI RSTB ^{440000nnssllooww}
glitch eater
RST_I
RST_I
EECS_O
0
Z
Z
Z
0
BPCS_O
1
Z
Z
Z
1
RCSB_O
1
Z
Z
Z
1
EECS_I
Z
Z
*1
Z
Z
BPCSB_I
Z
z
*2
Z
Z
RCSB_I
Z
z
*3
z
Z
EECS_O: EECS pin output driver
EECS_I : EECS pin input forcing
(*1, *2, *3) = (0,1,1) ---- normal operation mode
= (1,0,0) ---- fast EEPROM mode
= (1,0,1) ---- 90 test mode
= (1,1,0) ---- TP test mode
= (1,1,1) ---- AUI test mode
= (0,0,0) ---- AUI linear mode
FILE 3
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