參數(shù)資料
型號: 9860
廠商: Intel Corp.
英文描述: Advanced 10/100 Repeater with Intergrated Management
中文描述: 高級10/100中繼器與綜合管理
文件頁數(shù): 40/118頁
文件大小: 1648K
代理商: 9860
LXT9860/9880
Advanced 10/100 Repeater with Integrated Management
40
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
3.7.4
Serial LED Interface
The LXT98x0 provides a serial interface to drive additional LEDs via external 8-bit Serial-to-
Parallel converters. A maximum of 30 LEDs can be driven, using four S/P devices. Collision10/
100, Activity10/100 status indications are output on multiplexed configuration pins and are
duplicated on the Serial Port. (See
LED Pins Multiplexed with Configuration Inputs
on page 69
.)
3.7.4.1
Serial Shifting
Figure 6
shows the Serial LED shift loading.
3.7.4.2
Serial LED Signals
The LED serial interface bus consists of three LXT98x0 outputs: clock (LEDCLK), parallel load
clock (LEDLAT), and output data (LEDDAT). Refer to
Table 8 on page 27
for signal descriptions
and to
Figure 28 on page 71
for an illustration of the LED serial interface circuit. Refer to
Figure 7
and
Table 12
for details on the LED serial bit stream.
Figure 6. Serial LED Shift Loading
74X164
74X164
74X164
74X164
2
ACT100
LXT98xx
MII
Misc
ACT10
3
1
4
8
5
7
6
MII
1, 2, 3
Misc
Activity
10 Mbps
Activity
100 Mbps
Shift Order
MII1 LED1
Collision 10 Mbps
ACTG8
ACTG8
8
MII1 LED2
Collision 100 Mbps
ACTG7
ACTG7
7
MII1 LED3
Manager Present
ACTG6
ACTG6
6
MII2 LED1
Activity 10 Mbps
ACTG5
ACTG5
5
MII2 LED2
Activity 100 Mbps
ACTG4
ACTG4
4
MI2 LED3
Global Fault
ACTG3
ACTG3
3
Not Used
Not Used
ACTG2
ACTG2
2
Not Used
RPS Fault
ACTG1
ACTG1
1
30 LEDs
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