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Section 16 I
2
C Bus Interface 2 (IIC2)
Rev. 4.00 Sep. 14, 2005 Page 473 of 982
REJ09B0023-0400
Section 16 I
2
C Bus Interface 2 (IIC2)
The I
2
C bus interface 2 conforms to and provides a subset of the Philips I
2
C (Inter-IC) bus
interface functions. However, the configuration of the registers that control the I
2
C bus differs
partly from the Philips register configuration.
Figure 16.1 shows a block diagram of the I
2
C bus interface 2. Figure 16.2 shows an example of
I/O pin connections to external circuits.
16.1 Features
•
Selection of I
2
C format or clocked synchronous serial format
•
Continuous transmission/reception
Since the shift register, transmit data register, and receive data register are independent from
each other, the continuous transmission/reception can be performed.
I
2
C bus format:
•
Start and stop conditions generated automatically in master mode
•
Selection of acknowledge output levels when receiving
•
Automatic loading of acknowledge bit when transmitting
•
Bit synchronization/wait function
In master mode, the state of SCL is monitored per bit, and the timing is synchronized
automatically.
If transmission/reception is not yet possible, set the SCL to low until preparations are
completed.
•
Six interrupt sources
Transmit data empty (including slave-address match), transmit end, receive data full (including
slave-address match), arbitration lost, NACK detection, and stop condition detection
•
Direct bus drive
Two pins, SCL and SDA pins, function as NMOS open-drain outputs when the bus drive
function is selected.
Clocked synchronous format:
•
Four interrupt sources
Transmit-data-empty, transmit-end, receive-data-full, and overrun error
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
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Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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