Renesas R8C/15 Technical Information Seite 146
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R8C/14 Group, R8C/15 Group 14. Serial Interface
Rev.2.10 Jan 19, 2006 Page 132 of 253
REJ09B0164-0210
Figure 14.6 Transmit and Receive Operation
Transfer Clock
D0
TE Bit in U0C1
Register
TXD0
• Example of Transmit Timing (when internal clock is selected)
Set data to U0TB register
Transfer from U0TB register to UART0 transmit register
TC
CLK0
TCLK
Stop pulsing because the TE bit is set to “0”
D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
TC=TCLK=2(n+1)/fi
fi: frequency of U0BRG count source (f1, f8, f32)
n: setting value to U0BRG register
The above applies to the following settings:
• CKDIR bit in U0MR register = 0 (internal clock)
• CKPOL bit in U0C0 register = 0 (output transmit data at the falling edge and input receive data at the rising edge of the transfer clock)
• U0IRS bit in UCON register = 0 (an interrupt request is generated when the transmit buffer is empty):
D0
Set to "0" when interrupt request is acknowledged, or set by a program
Write dummy data to U0TB register
Transfer from U0TB register to UART0 transmit register
1/fEXT
D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5
Receive data is taken in
Read out from U0RB register
Transfer from UART0 receive register to
U0RB register
TI Bit in U0C1
Register
"1"
"0"
"1"
"0"
"1"
"0"
"1"
"0"
TXEPT Bit in
U0C0 Register
IR Bit in S0TIC
Register
Set to "0" when interrupt request is acknowledged, or set by a program
• Example of Receive Timing (when external clock is selected)
RE Bit in U0C1
Register
TE Bit in U0C1
Register
TI Bit in U0C1
Register
"1"
"0"
"1"
"0"
"1"
"0"
RI Bit in U0C1
Register
IR Bit in S0RIC
Register
"1"
"0"
"1"
"0"
CLK0
RXD0
The above applies to the following settings:
• CKDIR bit in U0MR register = 1 (external clock)
• CKPOL bit in U0C0 register = 0 (output transmit data at the falling edge and input receive data at the rising edge of the transfer clock)
Meet the following conditions when “H” is applied to the CLK0 pin before receiving data:
• TE bit in U0C1 register = 1 (enables transmit)
• RE bit in U0C1 register = 1 (enables receive)
• Write dummy data to the U0TB register
fEXT: frequency of external clock
- To our customers 1
- R8C/14 Group 3
- R8C/15 Group 3
- How to Use This Manual 5
- 3. M16C Family Documents 6
- Table of Contents 7
- 10. Protection 55 9
- 11. Interrupt 56 9
- 12. Watchdog Timer 78 9
- 13. Timers 83 9
- 14. Serial Interface 125 10
- 16. A/D Converter 168 10
- 18. Flash Memory Version 191 11
- 20. Precautions 235 11
- SFR Page Reference 13
- R8C/14 Group, R8C/15 Group 15
- 1. Overview 15
- 1.2 Performance Overview 16
- 1.3 Block Diagram 18
- Type No. R 5 F 21 14 4 D SP 19
- Type No. R 5 F 21 15 4 D SP 20
- 1.5 Pin Assignments 21
- 1.6 Pin Description 22
- 2.8.10 Reserved Bit 26
- 3. Memory 27
- 3.2 R8C/15 Group 28
- Table 4.2 SFR Information(2) 30
- Table 4.3 SFR Information(3) 31
- Table 4.4 SFR Information(4) 32
- 5. Reset 33
- to P3_5, P3_7 Input Port 34
- to P4_7 Input Port 34
- 5.1 Hardware Reset 35
- 5.1.2 Power on 35
- Power Supply 36
- Voltage Detection 36
- 5.2 Power-On Reset Function 37
- 5.3 Voltage Monitor 1 Reset 38
- 5.4 Voltage Monitor 2 Reset 38
- 5.5 Watchdog Timer Reset 38
- 5.6 Software Reset 38
- 6. Voltage Detection Circuit 39
- Figure 6.5 VW1C Register 43
- Figure 6.6 VW2C Register 44
- 6.1.1 Monitoring Vdet1 45
- 6.1.2 Monitoring Vdet2 45
- 6.2 Voltage Monitor 1 Reset 46
- 7. Processor Mode 49
- Figure 7.2 PM1 Register 50
- 9. Clock Generation Circuit 52
- Figure 9.2 CM0 Register 54
- Figure 9.3 CM1 Register 55
- Figure 9.4 OCD Register 56
- Figure 9.5 HRA0 Register 57
- 9.1 Main Clock 59
- 9.2 On-Chip Oscillator Clock 60
- 9.4 Power Control 62
- 9.4.1 Normal Operating Mode 62
- 9.4.2.4 Exiting Wait Mode 64
- 9.4.3 Stop Mode 65
- 9.4.3.1 Entering Stop Mode 65
- 9.4.3.3 Exiting Stop Mode 65
- 10. Protection 69
- 11. Interrupt 70
- 11.1.2 Software Interrupts 71
- 11.1.2.2 Overflow Interrupt 71
- 11.1.2.3 BRK Interrupt 71
- 11.1.5.1 Fixed Vector Tables 73
- 11.1.6 Interrupt Control 75
- Figure 11.4 INT0IC Register 76
- 11.1.6.1 I Flag 77
- 11.1.6.2 IR Bit 77
- 11.1.6.4 Interrupt Sequence 78
- Instruction in 79
- 11.1.6.7 Saving a Register 80
- 11.1.6.9 Interrupt Priority 81
- Level 0 (default value) 82
- 11.2 INT Interrupt 83
- 11.2.1 INT0 Interrupt 83
- 11.2.2 INT0 Input Filter 84
- Timer X Mode Register 85
- 11.2.4 INT3 Interrupt 86
- Figure 11.16 TCC1 Register 87
- 11.3 Key Input Interrupt 88
- Figure 11.18 KIEN Register 89
- 11.4 Address Match Interrupt 90
- 12. Watchdog Timer 92
- 13. Timers 97
- CNTRSEL=1 98
- CNTRSEL=0 98
- Figure 13.2 TXMR Register 99
- REJ09B0164-0210 100
- 13.1.1 Timer Mode 101
- 13.1.2 Pulse Output Mode 102
- 13.1.3 Event Counter Mode 104
- Input polarity selected to 112
- Figure 13.12 TZMR Register 113
- Figure 13.15 TCSS Register 116
- 13.2.1 Timer Mode 117
- • When count starts 119
- Timer Z Mode Register 127
- PREZ=01h, TZPR=01h, TZSC=02h 128
- 13.3 Timer C 129
- Timer C Register 131
- Figure 13.27 TCC0 Register 132
- Figure 13.28 TCC1 Register 133
- Figure 13.29 TCOUT Register 134
- 13.3.1 Input Capture Mode 135
- ←Measurement value 1 136
- ←Measurement value 2 136
- 13.3.2 Output Compare Mode 137
- 14. Serial Interface 139
- UART0 Bit Rate Register 141
- Set to “001b” 145
- 14.2.2 Bit Rate 153
- Figure 15.2 SSCRH Register 156
- SS Control Register L 157
- 15.1 Transfer Clock 163
- 15.3 Interrupt Requests 166
- 15.5.2 Data Transmit 169
- 15.5.3 Data Receive 171
- 15.5.4 Data Transmit/Receive 173
- I/O Pin and SS Shift Register 175
- 15.1.1 Association 175
- 15.6.2 Data Transmit 177
- 15.6.3 Data Receive 179
- 16. A/D Converter 182
- 16.1 One-Shot Mode 186
- 16.2 Repeat Mode 188
- 16.3 Sample and Hold 190
- 16.4 A/D Conversion Cycles 190
- 17. Programmable I/O Ports 193
- P1_0 to P1_3 194
- P1_6, P1_7 195
- P3_4, P3_5, P3_7 195
- P4_6/XIN 196
- P4_7/XOUT 196
- 17.4 Port setting 200
- 17.5 Unassigned Pin Handling 204
- 18. Flash Memory Version 205
- 18.2 Memory Map 207
- 18.3.1 ID Code Check Function 209
- Figure 18.4 OFS Register 210
- 18.4 CPU Rewrite Mode 211
- 18.4.1 EW0 Mode 212
- 18.4.2 EW1 Mode 212
- Full Status Check 213
- 18.4.2.10 FMR40 bit 214
- 18.4.2.11 FMR41 bit 214
- 18.4.2.12 FMR46 bit 214
- EW1 Mode Operating Procedure 217
- →wait until oscillation 218
- 18.4.3 Software Commands 219
- 18.4.3.1 Read Array Command 219
- 18.4.3.4 Program Command 220
- 18.4.3.5 Block Erase 221
- 18.4.4 Status Register 223
- 18.4.5 Full Status Check 224
- 18.5 Standard Serial I/O Mode 226
- 18.5.1 ID Code Check Function 226
- R8C/14, R8C/15 228
- 18.6 Parallel I/O Mode 230
- SSO(Output) 240
- SSI(Input) 240
- VCC = 5V 244
- VCC = 3V 248
- 20. Precautions 249
- 20.2 Interrupts 250
- 20.2.1 Reading Address 00000h 250
- 20.2.2 SP Setting 250
- 20.3 Clock Generation Circuit 253
- 20.4 Timers 254
- 20.4.1 Timers X and Z 254
- 20.4.2 Timer X 254
- 20.4.3 Timer Z 255
- 20.4.4 Timer C 255
- 20.5 Serial Interface 256
- 20.7 A/D Converter 258
- 20.8 Flash Memory Version 259
- 20.8.1 CPU Rewrite Mode 259
- 20.8.1.1 Operating Speed 259
- 20.8.1.3 Interrupts 259
- 20.8.1.9 Interrupt Request 260
- Generation during Auto-erase 260
- Operation in EW1 Mode 260
- 20.9 Noise 262
- Debugging Emulator 265
- Register Index 267
- REVISION HISTORY 268
- → “INT1” 271
- → Figure 18.16 276
- “8.16” → “8.56” 277
- Rev.2.10 Jan 19, 2006 278
- Renesas Technology Corp 278
- Hardware Manual 279
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