8101 Datasheet, PDF (115/172 Pages) LSI Computer Systems – Gigabit Ethernet Controller

TASND[5:0]
Transmit FIFO AutoSend Threshold
[5:0], R/W
TASND[5:0]
Range
Increment
111111
111110
Description
0−1024 words (0−4096 bytes)
8 words (32 bytes)
Reserved do not use
Transmit starts when 504 words in FIFO
000010
000001
000000
Transmit starts when 24 words in FIFO
Transmit starts when 16 words in FIFO
Transmit starts when 992 words in FIFO
Note 1: An EOF written into FIFO also starts transmission of that
packet regardless of the AutoSend threshold setting.
Note 2:
The 0b000000 setting in TASND[5:0] lets the FIFO fill up
before transmission starts, facilitating transmission of
oversize packets.
4.3.15 Register 18–Receive FIFO Threshold
15
8
7
0
RWM1[7:0]
RWM2[7:0]
Note: RWM1[15] 15-bit occurs on REGD15 pin.
RWM1[7:0]
Receive FIFO Watermark 1 Threshold [15:8], R/W
RWM1[7:0]
Range
Increment
11111111
11111110
11111110
Description
0−4096 words (0−16386 bytes)
16 words (64 bytes)
Reserved, do not use
4080 words in FIFO (16320 bytes)
4064 words in FIFO (16256 bytes)
00000001
00000000
32 words in FIFO (128 bytes)
16 words in FIFO (64 bytes)
Register Definitions
Copyright © 2000–2001 by LSI Logic Corporation. All rights reserved.
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