
45732 AMD 780E Databook 3.10
© 2009 Advanced Micro Devices, Inc.
7-6
Proprietary
VOH/VOL Test
8. Load JTAG instruction register with the instruction 1001 1001.
9. Run test by loading JTAG data register with data 0000 0000 0000 00xy, where bit x is the input value for
TEST_ODD and bit y that for TEST_EVEN (see Table 7-4 above).
10. To end test, load JTAG instruction register with the instruction 0101 1101.
7.4.3
VOH/VOL Pin List
Table 7-5 shows the RS780E VOH/VOL tree. There is no specific order for connection. Under the Control column, an
“ODD” or “EVEN” indicates that the logical output of the pin is same as the “TEST_ODD” or “TEST_EVEN” input
respectively.
When a differential pair appear in the table as a single entry, the output of the positive (“P”) pin is indicated in the Control
column (see last paragraph for explanations), and the output of the negative pin (“N”) will be of the opposite value. For
example, for entry no. 1 on the tree, when TEST_EVEN is 1, HT_TXCAD0P will give a value of 1 and HT_TXCAD0N
will give a value of 0.