LAN9730 Datasheet, PDF (143/222 Pages) SMSC Corporation – High-Speed Inter-Chip (HSIC) USB 2.0

LAN9730/LAN9730i
6.3.14 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 6.3.5, "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.
Type
RO
R/W
Note:
A value less than or equal to 4 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
NACKs if the Bulk-In Empty Response (BIR) bit is set.
Default
-
00h
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DS00001946A-page 143