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M38K09RFS bảng dữ liệu(PDF) 227 Page - Renesas Technology Corp

tên linh kiện M38K09RFS
Giải thích chi tiết về linh kiện  RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
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nhà sản xuất  RENESAS [Renesas Technology Corp]
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2.12 Standby function
Rev.2.00
Oct 05, 2006
page 98 of 111
38K0 Group
REJ09B0337-0200
APPLICATION
Fig. 2.12.4 Execution sequence example at restoration by occurrence of INT0 interrupt request
(3)
Notes on using stop mode
sRegister setting
Since values of the prescaler 12 and Timer 1 are automatically reloaded when returning from the
stop mode, set them again, respectively. (When the oscillation stabilizing time set after STP
instruction released bit is “0”)
sClock restoration
When the main clock side is set as a system clock, the oscillation stabilizing time for approximately
8,000 cycles of the XIN input is reserved at restoration from the stop mode.
Stop mode
XIN
(System clock)
INT0 pin
Prescaler 12 counter
Timer 1 counter
INT0 interrupt request bit
Peripheral device
CPU
Operating
Operating
Stopped
Stopped
Operating
Operating
512 counts
Oscillation stabilizing time
XIN; H
FF16
0116
Execute STP
instruction
INT0 interrupt signal
input (INT0 interrupt
request occurs)
Oscillation start
Prescaler 12 count start
512 counts down by
prescaler 12
Start supplying internal
clock
φ to CPU
Accept INT0 interrupt
request
Note: f(XIN)/16 is input as the prescaler 12 count source.
qWhen restoring microcomputer from stop mode by INT0 interrupt (rising edge selected)



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