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5228-DS04-R датащи(PDF) 80 Page - Broadcom Corporation.

номер детали 5228-DS04-R
подробное описание детали  10/100BASE-TX/FX Octal Transceiver
PDF  100 Pages
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производитель  BOARDCOM [Broadcom Corporation.]
домашняя страница  http://www.broadcom.com
Logo BOARDCOM - Broadcom Corporation.

5228-DS04-R датащи(HTML) 80 Page - Broadcom Corporation.

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BCM5228
Data Sheet
7/12/04
Broa d c om Co rp o r a t i o n
Page 68
Auxiliary Mode 3 Register (Shadow Register)
Document
5228-DS09-405-R
AUXILIARY MODE 3 REGISTER (SHADOW REGISTER)
FIFO Size Select[3:0]. The BCM5228 indicates the current selection of receive FIFO size using bit 3 through 0, as shown
in Table 47. The size can also be determined by the Extended FIFO Enable bit (register 10h, bit 2) and the Jumbo Packet
FIFO Enable bit (register 1Bh, bit 9) for backward compatibility with the 0.35-micron products.
Table 46: Auxiliary Mode 3 Register (Shadow Register 29d, 1Dh)
BIt
Name
R/W
Description
Default
15:9
Reserveda
a. Preserve existing values of reserved bits by completing a “Read/Modify Write.”
––
0
8
Reserveda
––
0
7
Reserveda
––
0
6
Reserveda
––
0
5:4
Reserveda
––
0h
3:0
FIFO Size Select [3:0]
R/W
Currently-selected receive FIFO size
4h
Note: R/W = Read/Write, RO = Read Only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear
after read operation. MII Shadow register bank 1 is accessed by setting MII register 1Fh bit 7 to a 1.
Table 47: Current Receive FIFO Size
FIFO Size Select[3:0]
Receive Fifo size in Use
(# of bits)
0000
12
0001
16
0010
20
0011
24
0100
28
0101
32
0110
36
0111
40
1000
44
1001
48
1010
52
1011
56
1100
60
1101
64



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