128
CHAPTER 7 RESETS
7.2
Reset Cause and Oscillation Stabilization Wait Times
The MB90390 series has four reset causes. The oscillation stabilization wait time for a
reset depends on the reset cause.
■
Reset Causes and Oscillation Stabilization Wait Times
Table 7.2-1 lists the reset causes and oscillation stabilization wait times.
HCLK:
Oscillation clock
WS1 and WS0: Oscillation stabilization wait time selection bits of the clock selection register (CKSCR)
Figure 7.2-1 shows the oscillation stabilization wait times at a power-on reset.
Figure 7.2-1 Oscillation Stabilization Wait Times at a Power-on Reset
Table 7.2-1 Reset Causes and Oscillation Stabilization Wait Times
Reset cause
Oscillation stabilization wait time
The corresponding time interval for an oscillation clock
frequency of 4 MHz is given in parentheses.
Power-on reset
always 2
18
/HCLK (approx. 65.54 ms at 4 MHz oscillator)
Watchdog timer
None
External reset via the RST pin
None; though bits WS1 and WS0 are initialized to "11
B
".
Software reset
None; though bits WS1 and WS0 are initialized to "11
B
".
2
17
/HCLK
2
17
/HCLK
V
oltage step-down
circ
u
it sta
b
ilization
wait inter
v
al
Oscillation
sta
b
ilization wait
time
E
v
al
u
ation/flash model
V
cc
CLK
CPU operation
HCLK: Oscillation clock
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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