PPC7A Product Manual
Functional Description
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st
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ID Link Register (Port 0x0864)
This register allows you to read the Board ID links (E4, E5, E8 and E10) or the VME Geographical
address pins.
MSB = D0, LSB = D7
D0: Reserved
D1: Reserved
D2: Reserved
D3:
GA4 (VME64 Geographical Address bit 4)
D4: E5/GA3
0 = Link fitted
1 = Link not fitted
D5: E10/GA2
0 = Link fitted
1 = Link not fitted
D6: E8/GA1
0 = Link fitted
1 = Link not fitted
D7: E4/GA0
0 = Link fitted
1 = Link not fitted
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Note:
Bits D4, D5, D6 and D7 are also connected to the VME64 Geographical Address bits GA3, GA2, GA1 and
GA0 respectively. Do not fit the links if you wish to read the status of the Geographical Address bits, as
the links connect these bits to 0 Volts.
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