LAN9500 Datasheet, PDF (140/213 Pages) SMSC Corporation – USB 2.0 to 10/100 Ethernet Controller Promiscuous mode

LAN950x
7.3.14 BURST CAP REGISTER (BURST_CAP)
Address:
038h
Size:
32 bits
This register is used to limit the size of the data burst transmitted by the UTX. When more than the amount specified in
the BURST_CAP register is transmitted, the UTX will send a ZLP.
Note: This register must be enabled through the Section 7.3.5, "Hardware Configuration Register (HW_CFG)".
Bits
31:8 RESERVED
Description
7:0 BURST_CAP
The maximum amount of contiguous data that may be transmitted by the
UTX before a ZLP is sent. This field has units of 512 bytes for HS mode and
64 bytes for FS mode.
Note:
A value less than or equal to 4 in HS mode or less than or equal to
32 in FS mode indicates that burst cap enforcement is disabled. In
this case, the UTX always responds to In Tokens with a ZLP when
the Bulk In Empty Response (BIR) bit in the Hardware Configuration
Register (HW_CFG) is deasserted. It will respond with NAKs if the
Bulk In Empty Response (BIR) bit is set.
Type
RO
R/W
Default
-
00h
DS00001875A-page 140
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