參數(shù)資料
型號: 82801E
廠商: INTEL CORP
元件分類: 外設(shè)及接口
英文描述: Intel 82801E Communications I/O Controller Hub (C-ICH)
中文描述: MULTIFUNCTION PERIPHERAL, PBGA421
封裝: BGA-421
文件頁數(shù): 77/84頁
文件大小: 1196K
代理商: 82801E
Intel
82801E C-ICH
Advance Information Datasheet
77
5.0
Testability
5.1
Test Mode Description
The 82801E C-ICH supports two types of test modes, a tri-state test mode and an XOR Chain test
mode. Driving RTCRST# low for a specific number of PCI clocks while PWROK is high activates
a particular test mode as described in Table 56.
Note:
RTCRST# can be driven low any time after PCIRST# is inactive.
.
Figure 29 illustrates the entry into a test mode. A particular test mode is entered upon the rising
edge of the RTCRST# after being asserted for a specific number of PCI clocks while PWROK is
active. To change test modes, the same sequence should be followed again. To restore the 82801E
C-ICH to normal operation, execute the sequence with RTCRST# being asserted so that no test
mode is selected as specified in Table 56.
Table 56. Test Mode Selection
Number of PCI Clocks RTCRST# Driven Low After
PWROK Active
Test Mode
<4
No Test Mode Selected
4
XOR Chain 1
5
XOR Chain 2
6
XOR Chain 3
7
XOR Chain 4
8
All “Z”
9 - 24
Reserved. DO NOT ATTEMPT
>24
No Test Mode Selected
Figure 29. Test Mode Entry (XOR Chain Example)
RSMRST#
PWROK
RTCRST#
Other Signal
Outputs
N Number of PCI Clocks
Test Mode Entered
All Output Signals Tri-Stated
XOR Chain Output Enabled
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