Техническая Спецификация для AMD 8151
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24888 Rev 3.03 - July 12, 2004
AMD-8151
TM
AGP Tunnel Data Sheet
43
9
Test
The IC includes the following test modes.
9.1
High Impedance Mode
In high-impedance mode, all the signals of the IC are placed into the high-impedance state.
9.2
NAND Tree Mode
There are several NAND trees in the IC. Some of the inputs are differential (e.g., LR[B, A] pins); for these, the
_P and _N pairs of signals are converted into a single signal that is part of the NAND tree, as shown in
Signal_3 in the following diagram.
_P and _N pairs of signals are converted into a single signal that is part of the NAND tree, as shown in
Signal_3 in the following diagram.
Mode
TEST A_TYPEDET LDTSTOP#
STRAPL0 Notes
Operational
0
X
X
X
High impedance
1
0
0
0
NAND tree
1
0
0
1
Table 17: Test modes.
Figure 5: NAND tree.
NAND Tree Mode
to output signal
Output signal
…
…
Signal_41
Signal_3_P
Signal_2
Signal_1
VDD
1
0
Signal_3_N
+
-