LAN89730 datasheet(135/218 Pages) MICROCHIP

135 / 218 page

 2013-2015 Microchip Technology Inc.

DS60001348A-page 135

LAN89730

7:4

Back Pressure Duration (BACK_DUR)

This field is used to select the time period for the Back Pressure Duration

Timer. This field has no function in full-duplex mode.

Note:

Back Pressure Duration is slightly greater in 10 Mbs mode.

Back Pressure Duration

100 Mbps Mode:

0h = 5 µs

1h = 10 µs

2h = 15 µs

3h = 25 µs

4h = 50 µs

5h = 100 µs

6h = 150 µs

7h = 200 µs

8h = 250 µs

9h = 300 µs

Ah = 350 µs

Bh = 400 µs

Ch = 450 µs

Dh = 500 µs

Eh = 550 µs

Fh = 600 µs

10 Mbps Mode:

0h = 7.2 µs

1h = 12.2 µs

2h = 17.2 µs

3h = 27.2 µs

4h = 52.2 µs

5h = 102.2 µs

6h = 152.2 µs

7h = 202.2 µs

8h = 252.2 µs

9h = 302.2 µs

Ah = 352.2 µs

Bh = 402.2 µs

Ch = 452.2 µs

Dh = 502.2 µs

Eh = 552.2 µs

Fh = 602.2 µs

R/W

Flow Control on Multicast Frame (FCMULT)

When this bit is set, the device will assert back pressure when the AFC level is

reached and a multicast frame is received. This field has no function in full-

duplex mode.

R/W

Flow Control on Broadcast Frame (FCBRD)

When this bit is set, the device will assert back pressure when the AFC level is

reached and a broadcast frame is received. This field has no function in full-

duplex mode.

R/W

Flow Control on Address Decode (FCADD)

When this bit is set, the device will assert back pressure when the AFC level is

reached and a frame addressed to the device is received. This field has no

function in full-duplex mode.

R/W

Bits

Description

Type

Default

LAN89730 Datasheet(PDF) 135 Page - Microchip Technology

LAN89730 Datasheet(HTML) 135 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL