Power Control
M30240 Group
Rev.1.00 Sep 24, 2003 Page 276 of 360
priority level (IPL), and enable the interrupt enable flag (I flag). When an interrupt clears a mode, that
interrupt is processed. Table 2.40 shows the interrupts that can be used for clearing stop mode and wait
mode.
2.12.1.4 Internal clock Φ in returning from wait mode or stop mode
(a) Returning from wait mode
The processor immediately returns to the Internal clock Φ, which was in use before entering wait
mode.
(b) Returning from stop mode
CM06 is set to “1” when the device enters stop mode. CM17 and CM16 do not change state. In this
case, when restored from stop mode, the device starts operating in divided-by-8 mode.
Table 2.42: Interrupts available for clearing stop mode and wait mode
Note 1: Can be used when an external clock in clock synchronous serial I/O mode is selected.
Note 2: Can be used when the external signal is being counted in event counter mode.
Note 3: Can be used in one-shot mode and one-shot sweep mode.
Note 4: Can be used only in USB suspend mode.
2.12.1.5 Sequence of returning from stop mode
The sequence for returning from stop mode consists of oscillation start-up time and the interrupt
Interrupt for clearing
Wait mode
Stop mode
CM02 = 0 CM02 = 1
Bus collision detection interrupt Supported Note 1 Note 1
DMA0 interrupt Not Supported Not Supported Not Supported
DMA1 interrupt Not Supported Not Supported Not Supported
Key input interrupt Supported Supported Supported
A-D interrupt Note 3 Not Supported Not Supported
UART0 transmit interrupt Supported Note 1 Note 1
UART0 receive interrupt Supported Note 1 Note 1
UART1 transmit interrupt Supported Note 1 Note 1
UART1 receive interrupt Supported Note 1 Note 1
UART2 transmit interrupt Supported Note 1 Note 1
UART2 receive interrupt Supported Note 1 Note 1
Timer A0 interrupt Supported Note 2 Note 2
Timer A1 interrupt Supported Note 2 Note 2
Timer A2 interrupt Supported Note 2 Note 2
Timer A3 interrupt Supported Note 2 Note 2
Timer A4 interrupt Supported Note 2 Note 2
Timer B0 interrupt Supported Note 2 Note 2
Timer B1 interrupt Supported Note 2 Note 2
USB Reset interrupt Supported Supported Not Supported
USB Suspend interrupt Supported Supported NotSupported
USB Resume interrupt Supported Supported Note 4
USB Start of Frame Supported Supported Not Supported
USB Function Supported Supported Not Supported
INT0
interrupt Supported Supported Supported
INT1
interrupt Supported Supported Supported
NMI
interrupt Supported Supported Supported
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