r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 984

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 USB Function Module (USB)
Rev. 1.00 Sep. 19, 2008 Page 954 of 1342
REJ09B0467-0100
USB cable connected
Bus idle of 3 ms or
Suspend/resume
interrupt occurs.
(IFR0/SURSF = 1)
USB function
more occurs
Figure 16.5 Suspend Operation
USBINTN2 or
USBINTN3
Clear SURSFE in IER0 to 0.
Check remote-wakeup
function enabled.
Set SSRSME in IER0 to 1.
Clear SURSF in IFR0 to 0.
Check if SURSS in IFR0
is set to 1.
Set standby timer select.
SBYCR/STS3 to STS0
(CTLR/RWUPS = 1?)
Module stop
(set MSTP17 in
EXMSTPCRL to 1.)
enter power-down
software standby
Wait for suspend/
wakeup enabled?
System needs to
resume interrupt
Enter software
standby mode
Need to enter
Remote
mode?
mode?
Y
Y
Y
Application
Check remote-wakeup
function disabled.
Clear SSRSME in IER0 to 0.
N
N
N
Set SURSFE in IER0 to 1.