Renesas R5S72621 User Manual
Section 26 USB 2.0 Host/Function Module
R01UH0134EJ0400 Rev. 4.00
Page 1355 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
26.3.3
System Configuration Status Register (SYSSTS)
SYSSTS is a register that monitors the line status (D + and D
lines) of the USB data bus.
This register is initialized by a power-on reset or a USB bus 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
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Undefined
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Undefined* Undefined*
LNST[1:0]
Bit Bit
Name
Initial
Value R/W
Description
15 to 11
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
should always be 0.
10
Undefined
R
Reserved
The read value is undefined. The write value should
always be 0.
always be 0.
9 to 2
All
0
R
Reserved
These bits are always read as 0. The write value
should always be 0.
should always be 0.
1, 0
LNST[1:0]
Undefined* R
USB Data Line Status Monitor
Indicates the status of the USB data bus lines (D+
and D-) as shown in table 26.5.
and D-) as shown in table 26.5.
These bits should be read after setting DPRPU to 1
to notify connection when the function controller
function is selected; whereas after setting DRPD to 1
to enable pulling down the lines when the host
controller function is selected.
to notify connection when the function controller
function is selected; whereas after setting DRPD to 1
to enable pulling down the lines when the host
controller function is selected.
Note: * Depends on the DP and DM pin status.