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| 型號(hào)： | 22505_1 |
| 英文描述： | AMD Test Interface Port Board Schematics? 149KB (PDF) |
| 中文描述： | AMD測試接口端口板原理圖？ 149KB（PDF格式） |
| 文件頁數(shù)： | 20/78頁 |
| 文件大?。?/td> | 2691K |
| 代理商： | 22505_1 |
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Test Interface Port Board User’s Manual
1-6
37
TIPSEL
O
TIP Select:
The hardware method of
indentifying that the TIP board is
physically connected to the host. The TIP
board has a 1-K
pulldown resistor on
TIPSEL. If the host board wants to use
TIPSEL to indicate that the TIP board is
connected, then the host board should
have a weak pullup resistor (10 K
) on
the signal connected to TIPSEL. When the
TIP board is connected to the host board,
TIPSEL signal goes High, indicating that
the TIP board is properly connected to the
host.
38
TAEN
I
Address Enable:
For ISA systems: When
asserted High, TAEN enables DMACs on
the buses and prevents I/O devices from
responding.
For the Am186
CC CDP: a chip select
that, when asserted Low, allows for
communication with the Ethernet
controller.
39
–
–
Pin is blank.
40
TRD
I
Read Strobe:
Indicates to the system that
the host microcontroller is performing a
memory or I/O read cycle.
41
–
–
Pin is blank.
42
TWR
I
Write Strobe:
Indicates to the system that
the host microcontroller is performing a
memory or I/O write cycle.
43
ENETIRQ
O
Ethernet Interrupt Request:
Indicates
that one of several status flags is set
(consult Ethernet controller specification
for details).
Table 1-1. Interface Connector Signal Descriptions (Continued)
Pin No.
Signal Name
Input/
Output
Description
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