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CHAPTER 21 400 kHz I
2
C INTERFACE
•
Note on using the devices except MB90F394H(A) and MB90V390H.
If the device is used in the following condition, it cannot receive as slave. So, sending general call
address is prohibited.
- Condition that there is other master mode LSI on the bus without MB90390 series, and
MB90390 series transmit the general-call address as master, and the arbitration lost occurs
after second byte.
•
When an instruction which generates a start condition is executed (the MSS bit is set to "1") at the
timing shown in Figure 21.2-3 and Figure 21.2-4, arbitration lost detection (AL bit = 1) prevents an
interrupt (INT bit = 1) from being generated.
- Condition 1 in which an interrupt (INT bit = 1) upon detection of " AL bit = 1 " does not occurs
When an instruction which generates a start condition is executed (setting the MSS bit in the
IBCR register to 1) with no start condition detected (BB bit = 0) and with the SDA or SCL pin at
the " L " level.
Figure 21.2-3 Diagram of Timing at which an Interrupt Upon Detection of " AL Bit = 1 " does not Occurs
"L"
"L"
1
0
0
SCL pin or SDA pin is Low level.
SCL pin
SDA pin
I
2
C operation enable state (EN bit =1)
Master mode setting (MSS bit = 1)
Arbitration lost detection (AL bit = 1)
Bus busy (BB bit)
Interruption (INT bit)
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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