m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 175

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.8.28. USB suspend interrupt request processing routine (1)
(4) USB Suspend Interrupt Request Processing Routine
Note 1: Confirms that the interrupt enable flag (I) of flag register is set to “0” before setting the interrupt to
Note 2: When the interrupt is not used to clear the stop mode, the interrupt should be disabled by setting
Clearing the protect
Setting USB control register
Setting the interruppt for return from suspend mode (Note1, 2)
Setting frequency synthesizer control register
When using the USB suspend interrupt, set USB suspend interrupt control register (address 0056
In the USB suspend interrupt, when the USB suspend status flag (SUSPEND) of USB power manage-
ment register is set to “1”, the interrupt request occurs.
The USB suspend interrupt request processing routine is shown in Figure 2.8.28 and Figure 2.8.29.
b7
b7
b7
b7
(key input interrupt, etc.) other than the USB resume interrupt.
higher priority level than the USB suspend interrupt. The interrupt should be higher priority level than
the USB suspend interrupt when those event are returned from the suspend mode by process
the interrupt priority level to “0”.
0
0
0
0
0
0
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0
0
0
b0
1
b0
b0
0
b0
0
Detection of USB suspend interrupt request
Protect register [Address 000A
PRCR
Enable bit for writing to system clock control registers 0 and 1
and frequency synthesizer related registers
Interrupt priority level select bit
Interrupt request bit
Frequency synthesizer control register [Address 03DC
FSC
USB resume interrupt control register [Address 0058
RSMIC
Frequency Synthesizer enable bit
USB control register [Address 000C
USBC
USB clock enable bit
b2 b1 b0
1 : Write-enabled
0 0 0 : Level 0 (interrupt disabled)
0 0 1 : Level 1
0 1 0 : Level 2
0 1 1 : Level 3
1 0 0 : Level 4
1 0 1 : Level 5
1 1 0 : Level 6
1 1 1 : Level 7
0 : Interrupt not requested
0 : Disabled
0: Disable (48MHZ clock supply disabled
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16
]
16
]
16
16
]
]
2. USB function
16
).