Product data

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Contents
Section 16 I
2
C Bus Interface [Option]............................................................................ 1
16.1 Overview ............................................................................................................................ 1
16.1.1 Features .................................................................................................................1
16.1.2 Block Diagram ...................................................................................................... 2
16.1.3 Input/Output Pins .................................................................................................. 4
16.1.4 Register Configuration.......................................................................................... 5
16.2 Register Descriptions.......................................................................................................... 6
16.2.1 I
2
C Bus Data Register (ICDR) .............................................................................. 6
16.2.2 Slave Address Register (SAR).............................................................................. 9
16.2.3 Second Slave Address Register (SARX) .............................................................. 10
16.2.4 I
2
C Bus Mode Register (ICMR)............................................................................ 11
16.2.5 I
2
C Bus Control Register (ICCR).......................................................................... 14
16.2.6 I
2
C Bus Status Register (ICSR)............................................................................. 21
16.2.7 Serial/Timer Control Register (STCR) ................................................................. 26
16.2.8 DDC Switch Register (DDCSWR) ....................................................................... 27
16.2.9 Module Stop Control Register (MSTPCR) ........................................................... 29
16.3 Operation............................................................................................................................ 30
16.3.1 I
2
C Bus Data Format.............................................................................................. 30
16.3.2 Master Transmit Operation ................................................................................... 32
16.3.3 Master Receive Operation..................................................................................... 34
16.3.4 Slave Receive Operation ....................................................................................... 37
16.3.5 Slave Transmit Operation...................................................................................... 39
16.3.6 IRIC Setting Timing and SCL Control ................................................................. 41
16.3.7 Automatic Switching from Formatless Mode to I
2
C Bus Format......................... 42
16.3.8 Operation Using the DTC ..................................................................................... 43
16.3.9 Noise Canceler ...................................................................................................... 44
16.3.10 Sample Flowcharts................................................................................................ 44
16.3.11 Initialization of Internal State................................................................................ 48
16.4 Usage Notes........................................................................................................................ 50
Section 22 Electrical Characteristics............................................................................... 57
22.1 Voltage of Power Supply and Operating Range ................................................................ 57
22.2 Electrical Characteristics [H8S/2128 Series, H8S/2128 F-ZTAT] .................................... 59
22.2.1 Absolute Maximum Ratings.................................................................................. 59
22.2.2 DC Characteristics ................................................................................................ 60
22.2.3 AC Characteristics ................................................................................................ 71
22.2.4 A/D Conversion Characteristics............................................................................ 90
22.2.5 Flash Memory Characteristics .............................................................................. 92
22.2.6 Usage Note............................................................................................................ 94