82443LX Datasheet, PDF (142/144 Pages) Intel Corporation – INTEL 440LX AGPSET: 82443LX PCI A.G.P. CONTROLLER (PAC)

INTEL 82443LX (PAC)
E
8.0. TESTABILITY
The test modes described below are provided in PAC for Automated Test Equipment (ATE) board level
testing.
RSTIN#
TEST#
REQ[3:0]#
Test Mode
PAC Test Modes
Off
Figure 36. Reset Enabled Test Mode
RESET_E
8.1. 82443LX (PAC) Test Modes
To enable a test mode, the TESTIN# input signal is asserted (low), and a 4-bit value is presented on the
REQ[3:0]# input pins. The following table shows the REQ[3:0]# encodings for test modes:
PCI REQ[3:0]
0010
0101
1111
Table 37. PAC Test Mode Select
Test Mode Enabled
Tri-State All Outputs
NAND Chain Test
Disable All Test Modes
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