LAN9211 datasheet(89/146 Pages) SMSC

89 / 146 page

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX

Datasheet

SMSC

LAN9211

Revision 1.93 (11-27-07)

DATASHEET

16-19

TX FIFO Size (TX_FIF_SZ). Sets the size of the TX FIFOs in 1KB values

to a maximum of 14KB. The TX Status FIFO consumes 512 bytes of the

space allocated by TX_FIF_SIZ, and the TX data FIFO consumes the

remaining space specified by TX_FIF_SZ. The minimum size of the TX

FIFOs is 2KB (TX data and status combined). The TX data FIFO is used for

both TX data and TX commands.

The RX Status and data FIFOs consume the remaining space, which is

equal to 16KB – TX_FIF_SIZ. See Section 5.3.9.1, "Allowable settings for

Configurable FIFO Memory Allocation," on page 91 for more information.

R/W

15-14

Reserved

13-12

Threshold Control Bits (TR). These control the transmit threshold values

the MIL should use. These bits are used when the SF bit is reset. The host

can program the Transmit threshold by setting these bits. The intent is to

allow the MIL to transfer data to the final destination only after the threshold

value is met.

In 10Mbps mode (TTM = 1) the threshold is set as follows:

In 100Mbps mode (TTM = 0) the threshold is set by as follows:

R/W

11-2

Reserved

Soft Reset Timeout (SRST_TO). If a software reset is attempted when the PHY

is not in the operational state (RX_CLK and TX_CLK running), the reset will not

complete and the soft reset operation will timeout and this bit will be set to a ‘1’. The

host processor must correct the problem and issue another soft reset.

BITS

DESCRIPTION

TYPE

DEFAULT

[13]

[12]

Threshold (DWORDS)

0012h

018h

020h

028h

[13]

[12]

Threshold (DWORDS)

0020h

040h

080h

100h

LAN9211 Datasheet(PDF) 89 Page - SMSC Corporation

LAN9211 Datasheet(HTML) 89 Page - SMSC Corporation

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