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VOH/VOL Test
TEST_ODD
TEST_EVEN
VOH/VOL
mode
The following is the truth table for the above VOH/VOL tree.
Table 7-4 Truth Table for the VOH/VOL Tree Outputs
Test Vector
TEST_ODD
Number
1
2
3
4
Refer to
Section 7.4.3
7.4.2
VOH/VOL Tree Activation
To activate the VOH/VOL tree and run a VOH/VOL test, perform the sequence below:
1. Supply a 10MHz clock to the REFCLK_P pin and a 10MHz differential clock pair to the HT_REFCLKP/N pins to
enable I/Os for testing.
2. Set POWERGOOD to 0.
3. Set TESTMODE to 1.
4. Set NC (ball E8) to 0.
5. Load JTAG instruction register with the instruction 0110 0011.
6. Load JTAG instruction register with the instruction 0010 0111.
7. Set POWERGOOD to 1.
© 2011 Advanced Micro Devices, Inc.
Proprietary
Figure 7-2 Sample of a Generic VOH/VOL Tree
TEST_EVEN
Output
Input
Input
Pin 1
0
0
0
1
1
0
1
1
for the list of pins that are on the VOH/VOL tree. VOH/VOL Tree Activation
Output
Output
Pin 2
Pin 3
0
0
0
0
1
0
1
0
1
1
1
1
Output
Output
Output
Pin 4
Pin 5
Pin 6
0
0
0
1
0
1
0
1
0
1
1
1
46136 AMD RX881 Databook 1.40
7-5
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