12 User’s Guide
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ABHiQV
(Fab Rev. C)
Subject to Change Without Notice
Revision 1.1 7/15/98
4.2
Top Assembly Check Boxes
The bottom side of the board is silk-screened with a list of possible ’top assemblies’ for which the AB-
HiQV daughtercard can be built. The list is the same as shown below (four possible top assembly ver-
sions). The intent is that when the daughtercard is built, a check mark will be placed in the box next to
the appropriate top assembly version. For example, if a B65555 chip and EDO DRAM are soldered
onto the board, the “AB65555-QEDO” box will have a check mark placed in it.
The complete list of possible usages of the ABHiQV daughtercard is as follows:
AB65555-QEDO
(B65555 with PQFP EDO DRAM*)
AB69000
(B69000 with no external DRAM)
* ’QEDO’ refers to EDO DRAM in the PQFP package footprint.
4.3
W1 Jumper
Jumper W1 provides a convenient reset strapping option for AA4 (see Table 7):
W1 closed
External OSC for MCLK and DCLK option set low at reset
W1 open
External OSC for MCLK and DCLK option set high at reset
4.4
W2 Jumper
Jumper W2 governs the source of the external oscillator supply voltage:
W2 closed
BVCC55X supplies voltage for external oscillator for MCLK and DCLK
W2 open
no supply voltage for external oscillator
4.5
W3 Jumper
Jumper W3 provides a convenient reset strapping option for AA6 (see Table 7):
W3 open
ACTI/ENABKL option set high at reset
W3 closed
ACTI/ENABKL option set low at reset
4.6
W4 and W5 Test Configuration Jumpers
Jumpers W4 and W5 control the test mode inputs on the B69000:
W4
TMD0 (open for normal operation)
W5
TMD1 (open for normal operation)
