LM3S5749 Datasheet, PDF (757/947 Pages) Texas Instruments – Stellaris® LM3S5749 Microcontroller

Stellaris® LM3S5749 Microcontroller
Register 83: USB Request Packet Count in Block Transfer Endpoint 1
(USBRQPKTCOUNT1), offset 0x304
Register 84: USB Request Packet Count in Block Transfer Endpoint 2
(USBRQPKTCOUNT2), offset 0x308
Register 85: USB Request Packet Count in Block Transfer Endpoint 3
(USBRQPKTCOUNT3), offset 0x30C
Host
This 16-bit read/write register is used in Host mode to specify the number of packets that are to be
transferred in a block transfer of one or more bulk packets to receive endpoint n. The USB controller
uses the value recorded in this register to determine the number of requests to issue where the
AUTORQ bit in the USBRXCSRHn register has been set. See “IN Transactions as a Host” on page 684.
Note: Multiple packets combined into a single bulk packet within the FIFO count as one packet.
USB Request Packet Count in Block Transfer Endpoint 1 (USBRQPKTCOUNT1)
Base 0x4005.0000
Offset 0x304
Type R/W, reset 0x0000
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
COUNT
Type R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
15:0
Name
COUNT
Type
R/W
Reset
0x0000
Description
Block Transfer Packet Count
Sets the number of packets of the size defined by the MAXLOAD bit field
that are to be transferred in a block transfer.
Note: This is only used in Host mode when AUTORQ is set. The bit
has no effect in Device mode or when AUTORQ is not set.
November 17, 2011
757
Texas Instruments-Production Data