Universal Serial Bus Controller User's Guide

4.56 Maximum Packet Size for Peripheral/Host Transmit Endpoint (TXMAXP)
www.ti.com Registers
The Maximum Packet Size for Peripheral/Host Transmit Endpoint (TXMAXP) is shown in Figure 71 and
described in Table 72 .
Figure 71. Maximum Packet Size for Peripheral/Host Transmit Endpoint (TXMAXP)
15 11 10 0
Reserved MAXPAYLOAD
R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 72. Maximum Packet Size for Peripheral/Host Transmit Endpoint (TXMAXP)
Field Descriptions
Bit Field Value Description
15-11 Reserved 0 Reserved
10-0 MAXPAYLOAD 0-FFh The maximum payload transmitted in a single transaction. The value set can be up to 1024 bytes,
but is subject to the constraints placed by the USB Specification on packet sizes for Bulk, Interrupt,
and Isochronous transfers in full-speed and high-speed operations. The value written to this register
should match the wMaxPacketSize field of the Standard Endpoint Descriptor for the associated
endpoint. A mismatch could cause unexpected results.
SPRUGH3 – November 2008 Universal Serial Bus (USB) Controller 119
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