82093AA Datasheet, PDF (19/20 Pages) Intel Corporation – I/O ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER (IOAPIC)

E
82093AA (IOAPIC)
6.3. Drive 0’s to all the output pins
This is a special test mode that enables all the outputs into a low state. How to enable this mode:
1. TESTIN# = 0
2. INTIN(21:17) = 00100
3. All the outputs will be driven to 0
6.4. NAND Tree
The NAND tree is also useful for Automated Test Equipment (ATE) at board level testing. The NAND Tree
allows the tester to test the solder connections for each individual signal pin. How to enable this mode:
1. All pins included in the NAND tree are driven to 1
2. TESTIN# = 0
3. INTIN(21:17) = x1x1x
Table 6. NAND Tree
Signal Name
Pin#
Comment
DATA_2
57
Start Nandtree
DATA_1
58
DATA_0
59
CSb
61
APICD_0
4
APICD_1
5
SMIOUTb
6
APICACK2b
8
APICREQb
9
APICACKb
10
WRb
11
RDb
12
SA_0
13
SA_1
14
DIb
15
INTIN_13
16
INTIN_0
17
INTIN_14
18
INTIN_15
21
PRELIMINARY
Nand tree Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
19