8101 datasheet(115/172 Pages) LSI

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4-27

TASND[5:0]

Transmit FIFO AutoSend Threshold

[5:0], R/W

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

Note:

RWM1[15] 15-bit occurs on REGD15 pin.

RWM1[7:0]

Receive FIFO Watermark 1 Threshold

[15:8], R/W

TASND[5:0]

Description

Range

−1024 words (0−4096 bytes)

Increment

8 words (32 bytes)

111111

Reserved do not use

111110

Transmit starts when 504 words in FIFO

000010

Transmit starts when 24 words in FIFO

000001

Transmit starts when 16 words in FIFO

000000

Transmit starts when 992 words in FIFO

RWM1[7:0]

RWM2[7:0]

RWM1[7:0]

Description

Range

−4096 words (0−16386 bytes)

Increment

16 words (64 bytes)

11111111

Reserved, do not use

11111110

4080 words in FIFO (16320 bytes)

11111110

4064 words in FIFO (16256 bytes)

00000001

32 words in FIFO (128 bytes)

00000000

16 words in FIFO (64 bytes)

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