Renesas M16C Series User Manual page 176

M30245 Group
Stop all clocks
b7
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Execute the interrupt process
for return from suspend state
Restore the settings changed for stop mode as required.
Figure 2.8.29. USB suspend interrupt request processing routine (2)
(5) USB Resume Interrupt Request Processing Routine
When the resume signal is received from the host CPU during the USB suspend mode (when de-
tected any bus activity on D+/D- line in suspend detect state), the USB resume interrupt request
occurs. The USB suspend status flag is automatically set to "0" at this time.
The USB resume interrupt request processing routine is shown in Figure 2.8.30.
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
b0
System clock control register 1 [Address 0007
0 0 0 0 1
CM1
All clock stop control bit
1: All clocks off (stop mode)
Insert at least four NOPs following JMP.B instruction after the instruction that sets the all clock stop control bit to
• Shift to stop mode
Wait for the interrupt for return from suspend state
Interrupt enable flag ← "0"
Protect disabled, etc.
USB suspend interrupt request process is complete
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Interrupt enable flag (I) ← "1"
]
16
the interrupt for return from suspend state occurs
(USB resume/remote wakeup)
2. USB function
"1"
.