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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
Section 7.4.3
Refer to
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 REF_CLKP 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 DAC_SDA 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.
© 2009 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
45732 AMD 780E Databook 3.10
7-5
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