r8a66597 Renesas Electronics Corporation., r8a66597 Datasheet - Page 74

• Manufacturer Part Number: r8a66597
• Description: Assp Usb2.0 2 Port Host/1 Port Peripheral Controller
• Manufacturer: Renesas Electronics Corporation.

R8A66597FP/DFP/BG
Remarks
None
2.14.5 Length bit (wLength)
2.14.5.1 Selecting the Host Controller function
2.14.5.2 Selecting the Peripheral Controller function
R e v 1 . 0 1
♦ USB request index register [USBLENG]
15-0
Bit
15
0
0
wLength
Length
This is the bit to write and read the value of the USB request wLength. b7-0 is a lower byte.
The USB request wLength value received in Setup transaction by the controller is set in this bit. It is not possible to
write to this bit using the software.
Use the software to write the value of the USB request wIndex of the Setup transaction to be sent.
Use the software to write "SUREQ=1", but do not rewrite this bit until "SUREQ=0" is set by the controller.
14
0
0
O c t 1 7 , 2 0 0 8
Name
13
0
0
12
0
0
p a g e 7 4 o f 1 8 3
USB request wLength value
11
0
0
10
0
0
9
0
0
Function
8
0
0
wLength
7
0
0
6
0
0
5
0
0
When H:R/W
When P:R
Software
4
0
0
3
0
0
When P:W
When H:R
Hardware
2
0
0
<Address: 5AH>
1
0
0
Remarks
0
0
0