lxt9763 Intel Corporation, lxt9763 Datasheet - Page 72

• Manufacturer Part Number: lxt9763
• Description: Fast Ethernet 10/100 Hex Transceiver With Full Mii
• Manufacturer: Intel Corporation

LXT9763 — Fast Ethernet 10/100 Hex Transceiver with Full MII
72
20.3:2
20.1
20.0
28.15:4
28.3:2
28.1:0
30.15:14
30.13
30.12:0
1. R/W = Read /Write.
2. Link status is the primary LED driver. The LED is asserted (solid ON) when the link is up.
3. Combined event LED settings are not affected by Pulse Stretch bit 20.1. These display settings are stretched regardless of
4. Duplex status is the primary LED driver. The LED is asserted (solid ON) when the link is full duplex.
5. Duplex LED maybe active for a brief time after loss of link.
1. Transmit Control functions are approximations. They are not guaranteed and not subject to production testing.
2. RO = Read Only.
3. The default setting of bits 28.1:0 (Risetime) are determined by pins 91 and 94.
1. RO = Read Only.
Bit
The secondary LED driver (Receive, Activity or Isolate) causes the LED to change state (blink).
the value of 20.1.
Collision status is the secondary LED driver. The LED changes state (blinks) when a collision occurs.
R/W = Read/Write.
Table 51. LED Configuration Register (Address 20, Hex 14) (Continued)
Table 52. Transmit Control Register #1 (Address 28)
Table 53. Transmit Control Register #2 (Address 30)
Bit
Bit
LEDFREQ
PULSE-
STRETCH
Reserved
Reserved
Bandwidth
Control
Risetime
Control
Reserved
Increase Driver
Amplitude
Reserved
Name
Name
1
Name
00 = Stretch LED events to 30 ms.
01 = Stretch LED events to 60 ms.
10 = Stretch LED events to 100 ms.
11 = Reserved.
0 = Disable pulse stretching of all LEDs.
1 = Enable pulse stretching of all LEDs.
Ignore.
00 = Nominal Differential Amp Bandwidth
01 = Slower
10 = Fastest
11 = Faster
00 = 2.5ns
01 = 3.1ns
10 = 3.7ns
11 = 4.3ns
1 = Increase Driver Amplitude 5% in all modes.
0 = Normal operation.
Description
Description
Description
Type
R/W
R/W
R/W
Type
Type
R/W
R/W
R/W
R/W
R/W
R/W
2
1
Datasheet
Default
Default
Default
Note 3
N/A
N/A
N/A
00
00
0
1
0