AMD
Board #4 failed on another occasion after the errors indicated above, but this failure was
due to a power supply failure. Failure time was subtracted from the total run time, and
errors were not indicated in the total. Also, boards #2 and #4 ran over 1,000 hours each
without any error after the only noted error occurrence.
CONCLUS ION
The fives sets of TAXI Transmitters and Receivers have run a sum total of 7,000 hours
(3.15 x 1014 bytes) with two error events.
Fig u re 2 0
TAXI K2 Bo a rd Tra n s m it /Re c e ive S e c t io n
VCC
VCC
A
B
TAXI
TX
TAXI
TX
ROM and
Comparator
ROM
12330E-57
Note:
TAXI K2 board includes both TAXI TX and TAXI RX. Each half may be used independently or with other
boards with matching ROM data patterns. For the test described above, FDDI DDJ ROM patterns were used.
VCC Conditions
TAXI TX
TAXI RX
SETUP 1
SETUP 2
5
5
4–6 Variable
4–6 Variable
4–6 Variable
4–6 Variable
SETUP 3
4
6
6
4
TAXIchip Integrated Circuits Technical Manual
123
AMD [ AMD ]
