450
CHAPTER 22 SERIAL I/O
22.4.3
Shift Operation Start/Stop Timing
To start the shift operation, set the STOP bit to "0" and the STRT bit to "1" in SMCS.
The system may stop the shift operation at the end of transfer or when "1" is set in the
STOP bit.
• Stop by STOP=1
→
The system stops with SIR=0 regardless of the MODE bit
• Stop by end of transfer
→
The system stops with SIR=1 regardless of the MODE bit
Regardless of the MODE bit, the BUSY bit becomes "1" during serial transfer and
becomes "0" during stop or Read/Write standby state. To check the transfer status,
read this bit.
■
Shift Operation Start/Stop Timing
●
Internal shift clock mode (LSB first)
Figure 22.4-3 Shift Operation Start/Stop Timing (Internal Clock)
●
External shift clock mode (LSB first)
Figure 22.4-4 Shift Operation Start/Stop Timing (External Clock)
SCK4
STRT
BUSY
SOT4
DO0
(Transfer start)
(Transfer end)
If MODE=0
DO7 (Data maintained)
"1" output
SCK4
STRT
BUSY
SOT4
DO0
(Transfer start)
(Transfer end)
If MODE=0
DO7 (Data maintained)
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Страница 18: ...xiv ...
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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