lan9215i Standard Microsystems Corp., lan9215i Datasheet - Page 94

• Manufacturer Part Number: lan9215i
• Description: Lan9215i 16-bit Non-pci 10/100 Ethernet Controller With Hp Auto-mdix And Industrial Temperature Support
• Manufacturer: Standard Microsystems Corp.

Revision 2.3 (08-06-08)
BITS
0
Flow Control on Any Frame (FCANY). When this bit is set, the LAN9215i
will assert back pressure, or transmit a pause frame when the AFC level is
reached and any frame is received. Setting this bit enables full-duplex flow
control when the LAN9215i is operating in full-duplex mode.
When this mode is enabled during half-duplex operation, the Flow Controller
does not decode the MAC address and will send a pause frame upon
receipt of a valid preamble (i.e., immediately at the beginning of the next
frame after the RX data FIFO level is reached).
When this mode is enabled during full-duplex operation, the Flow Controller
will immediately instruct the MAC to send a pause frame when the RX data
FIFO level is reached. The MAC will queue the pause frame transmission
for the next available window.
Setting this bit overrides bits [3:1] of this register.
[19:16]
Ah
Bh
Ch
Dh
Eh
Fh
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
Table 5.5 Backpressure Duration Bit Mapping
DESCRIPTION
100Mbs Mode
DATASHEET
100uS
150uS
200uS
250uS
300uS
350uS
400uS
450uS
500uS
550uS
600uS
10uS
15uS
25uS
50uS
5uS
16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
94
BACKPRESSURE DURATION
10Mbs Mode
102.2uS
152.2uS
202.2uS
252.2uS
302.2uS
352.2uS
402.2uS
452.2uS
502.2uS
552.2uS
602.2uS
12.2uS
17.2uS
27.2uS
52.2uS
TYPE
7.2uS
R/W
DEFAULT
SMSC LAN9215i
Datasheet
0