User’s Manual U18279EJ3V0UD
15
17.7.4
Operation without communication ............................................................................................. 894
17.7.5
Arbitration loss operation (operation as slave after arbitration loss) .......................................... 895
17.7.6
Operation when arbitration loss occurs (no communication after arbitration loss)..................... 897
17.8
Interrupt Request Signal (INTIIC) Generation Timing and Wait Control ...........................904
17.9
Address Match Detection Method.........................................................................................905
17.10 Error Detection ........................................................................................................................905
17.11 Extension Code .......................................................................................................................905
17.12 Arbitration................................................................................................................................906
17.13 Wakeup Function ....................................................................................................................907
17.14 Communication Reservation .................................................................................................908
17.14.1 When communication reservation function is enabled (IICF0.IICRSV0 bit = 0)......................... 908
17.14.2 When communication reservation function is disabled (IICF0.IICRSV0 bit = 1) ........................ 911
17.15 Cautions...................................................................................................................................912
17.16 Communication Operations...................................................................................................913
17.16.1 Master operation in single master system ................................................................................. 914
17.16.2 Master operation in multimaster system .................................................................................... 915
17.16.3 Slave operation ......................................................................................................................... 918
17.17 Timing of Data Communication.............................................................................................921
CHAPTER 18 BUS CONTROL FUNCTION.........................................................................................928
18.1
Features ...................................................................................................................................928
18.2
Bus Control Pins .....................................................................................................................929
18.2.1
Pin status during internal ROM, internal RAM, and on-chip peripheral I/O access.................... 929
18.3
Memory Block Function .........................................................................................................930
18.3.1
Chip select control function ....................................................................................................... 930
18.4
Bus Cycle Type Control Function .........................................................................................931
18.5
Bus Access..............................................................................................................................932
18.5.1
Number of access clocks .......................................................................................................... 932
18.5.2
Bus sizing function .................................................................................................................... 933
18.5.3
Endian function.......................................................................................................................... 934
18.5.4
Bus width................................................................................................................................... 934
18.6
Wait Function ..........................................................................................................................941
18.6.1
Programmable wait function ...................................................................................................... 941
18.6.2
External wait function ................................................................................................................ 944
18.6.3
Relationship between programmable wait and external wait ..................................................... 944
18.6.4
Bus cycles in which wait function is valid................................................................................... 945
18.7
Idle State Insertion Function..................................................................................................946
18.8
Bus Timing...............................................................................................................................948
18.9
Bus Priority Order...................................................................................................................958
18.10 Boundary Operation Conditions ...........................................................................................958
18.10.1 Program space .......................................................................................................................... 958
18.10.2 Data space ................................................................................................................................ 958
CHAPTER 19 DMA FUNCTIONS (DMA CONTROLLER)..................................................................959
19.1
Features ...................................................................................................................................959
19.2
Configuration ..........................................................................................................................960
19.3
Control Registers....................................................................................................................961