Renesas R5S72621 User Manual
Section 26 USB 2.0 Host/Function Module
R01UH0134EJ0400 Rev. 4.00
Page 1471 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
26.3.40
USB AC Characteristics Switching Register 1 (USBACSWR1)
USBACSWR1 makes the necessary settings for the USB transceiver built in this module. This
register is initialized by a power-on reset.
register is initialized by a power-on reset.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit:
Initial value:
R/W:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R/W
R
R
R
R
R
R
R
R
R
R
—
—
—
—
—
—
UACS25
—
—
—
—
—
—
—
—
—
Bit Bit
Name
Initial
Value
Value
R/W
Description
15 to 10
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
should always be 0.
9
UACS25
0
R/W
USB AC Characteristics Switching 25
This bit adjusts the eye-pattern characteristics in high
speed.
8 to 0
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Note:
This bit should always be 1 when using this module.
For details, refer to section 26.5.1, Procedure for Setting the USB Transceiver.