Renesas R8C/21 Manuals

Manuals and User Guides for Renesas R8C/21. We have 1 Renesas R8C/21 manual available for free PDF download: Hardware Manual

Renesas R8C/21 Hardware Manual

Renesas R8C/21 Hardware Manual (501 pages)

Brand: Renesas | Category: Control Unit | Size: 5 MB

Table of Contents

Table of Contents
8
Overview
17
1 Overview

18
- Performance Overview
  18
- Block Diagram
  20
- Product Information
  21
- Pin Assignments
  23
- Pin Functions
  24
2 Central Processing Unit (CPU)

26
- Data Registers (R0, R1, R2 and R3)
  27
  - Interrupt Enable Flag (I)
    28
3 Memory

29
- R8C/21 Group
  30
4 Special Function Registers (Sfrs)

31
5 Resets

37
- Hardware Reset
  40
- Power-On Reset Function
  42
- Voltage Monitor 1 Reset
  43
6 Voltage Detection Circuit

44
7 Programmable I/O Ports

54
- Effect on Peripheral Functions
  55
- Port Settings
  66
- Unassigned Pin Handling
  77
8 Processor Mode

78
10 Clock Generation Circuit

80
- XIN Clock
  87
- On-Chip Oscillator Clocks
  88
- CPU Clock and Peripheral Function Clock
  89
- Power Control
  90
  - Wait Mode
    91
  - Stop Mode
    95
  - Oscillation Stop Detection Function
    98
- Notes on Clock Generation Circuit
  101
11 Protection

102
- Interrupts
  103
- Software Interrupts
  104
- Special Interrupts
  105
- Interrupts and Interrupt Vector
  106
- Interrupt Control
  108
- INT Interrupt
  117
  - Inti Input Filter (I = 0 to 3)
    119
- Key Input Interrupt
  120
- Address Match Interrupt
  122
  - Notes on Interrupts
    126
  - Changing Interrupt Sources
    127
  - Changing Interrupt Control Register Contents
    128
13 Watchdog Timer

129
- Count Source Protection Mode Disabled
  132
- Count Source Protection Mode Enabled
  133
14 Timers

134
- Timer RA
  136
  - Timer Mode
    140
  - Pulse Output Mode
    142
  - Event Counter Mode
    144
  - Pulse Width Measurement Mode
    146
  - Pulse Period Measurement Mode
    149
  - Notes on Timer RA
    152
- Timer RB
  153
  - Timer Mode
    157
  - Programmable Waveform Generation Mode
    160
  - Programmable One-Shot Generation Mode
    163
  - Programmable Wait One-Shot Generation Mode
    167
  - Notes on Timer RB
    171
- Timer RD
  175
- Count Source
  180
  - Buffer Operation
    181
  - Synchronous Operation
    183
  - Pulse Output Forced Cutoff
    184
  - Input Capture Function
    186
  - Output Compare Function
    200
  - PWM Mode
    216
  - Reset Synchronous PWM Mode
    229
  - Complementary PWM Mode
    239
  - PWM3 Mode
    253
- Timer RD Interrupt
  265
  - Notes on Timer RD
    267
- Timer RE
  273
  - Output Compare Mode
    274
  - Notes on Timer RE
    280
15 Serial Interface

281
- Clock Synchronous Serial I/O Mode
  287
  - Polarity Select Function
    290
  - Continuous Receive Mode
    291
- Clock Asynchronous Serial I/O (UART) Mode
  292
  - Bit Rate
    296
- Notes on Serial Interface
  297
- Clock Synchronous Serial Interface
  298
16 Clock Synchronous Serial Interface

299
- Clock Synchronous Serial I/O with Chip Select (SSU)
  299
  - Transfer Clock
    308
  - SS Shift Register (SSTRSR)
    310
- Interrupt Requests
  311
  - Communication Modes and Pin Functions
    312
  - Clock Synchronous Communication Mode
    313
  - Operation in 4-Wire Bus Communication Mode
    320
  - SCS Pin Control and Arbitration
    326
  - Notes on Clock Synchronous Serial I/O with Chip Select
    327
  - I 2 C Bus Interface
    328
  - Transfer Clock
    338
  - Interrupt Requests
    339
  - Clock Synchronous Serial Mode
    351
  - Noise Canceller
    354
  - Bit Synchronization Circuit
    355
  - Examples of Register Setting
    356
17 Hardware LIN

361
- Input/Output Pins
  362
- Register Configuration
  363
- Functional Description
  365
  - Slave Mode
    368
  - Bus Collision Detection Function
    372
  - Hardware LIN End Processing
    373
  - Interrupt Requests
    374
- Notes on Hardware LIN
  375
18 A/D Converter

376
- One-Shot Mode
  380
- Repeat Mode
  383
- Sample and Hold
  386
- A/D Conversion Cycles
  387
- Internal Equivalent Circuit of Analog Input
  388
- Output Impedance of Sensor under A/D Conversion
  389
- Notes on A/D Converter
  390
19 Flash Memory

391
- Memory Map
  393
- Functions to Prevent Rewriting of Flash Memory
  396
  - ROM Code Protect Function
    397
  - CPU Rewrite Mode
    398
  - EW0 Mode
    399
  - Software Commands
    408
  - Status Registers
    413
  - Full Status Check
    414
- Standard Serial I/O Mode
  416
- Parallel I/O Mode
  420
- Notes on Flash Memory
  421
20 Electrical Characteristics

424
21 Usage Notes

444
- Notes on Interrupts
  445
  - Changing Interrupt Sources
    446
  - Changing Interrupt Control Register Contents
    447
- Notes on Timers
  448
  - Notes on Timer RB
    449
    
    Notes on Timer RD
    453
    
    Notes on Timer RE
    459
    
    Notes on Serial Interface
    460
    
    Clock Synchronous Serial Interface
    461
    
    Notes on Hardware LIN
    462
- Notes on A/D Converter
  463
- Notes on Flash Memory
  464
- Notes on Noise
  467
22 Notes on On-Chip Debugger

468
23 Notes on Emulator Debugger

469
Appendix 1. Package Dimensions

470
Appendix 2. Connection Examples between Serial Writer and On-Chip Debugging Emulator

471
Appendix 3. Example of Oscillation Evaluation Circuit

472
- Index
  473

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