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DP83848M bảng dữ liệu(PDF) 49 Page - National Semiconductor (TI)

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49
7.2.5 LED Direct Control Register (LEDCR)
This register provides the ability to directly control the LED outputs. It does not provide read access to the LEDs.
Table 23. LED Direct Control Register (LEDCR), address 0x18
Bit
Bit Name
Default
Description
15:6
RESERVED
0, RO
RESERVED: Writes ignored, read as 0.
5
DRV_SPDLED
0, RW
1 = Drive value of SPDLED bit onto LED_SPEED output
0 = Normal operation
Note: Available only in DP83848J. This bit is reserved in
DP83848M
4
DRV_LNKLED
0, RW
1 = Drive value of LNKLED bit onto LED_LINK output
0 = Normal operation
3
RESERVED
0
RESERVED:
Must be zero.
2
SPDLED
0, RW
Value to force on LED_SPEED output
Note: Available only in DP83848J. This bit is reserved in
DP83848M and must be zero
1
LNKLED
0, RW
Value to force on LED_LINK output
0
RESERVED
0
RESERVED:
Must be zero.



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