41978 AMD RS690M Databook 3.06
© 2008 Advanced Micro Devices, Inc.
7-6
Proprietary
VOH/VOL Test
Figure 7-2 Sample of a Generic VOH/VOL Tree
The following is the truth table for the above VOH/VOL tree.
Table 7.4.3, “VOH/VOL Pin List,” on page 7-7
for the list of pins that are on the VOH/VOL tree.
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 clock at any speed (same or faster than test pattern data rate) to the OSCIN pin as the I/O test clock source.
2. Set POWERGOOD to 0.
3. Set TESTMODE to 1.
4. Set DACSDA 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.
1
6
5
4
3
2
VOH/VOL
mode
TEST_ODD
TEST_EVEN
Table 7-5 Truth Table for the VOH/VOL Tree Outputs
Test Vector
Number
TEST_ODD
Input
TEST_EVEN
Input
Output
Pin 1
Output
Pin 2
Output
Pin 3
Output
Pin 4
Output
Pin 5
Output
Pin 6
1
0
0
0
0
0
0
0
0
2
0
1
0
1
0
1
0
1
3
1
0
1
0
1
0
1
0
4
1
1
1
1
1
1
1
1