Maxim-integrated High-Speed Microcontroller Bedienungsanleitung Seite 144
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High-Speed Microcontroller User’s Guide
Rev: 062210 144 of 176
Figure 12-1. Serial Port Mode 0
DIVIDE
BY 12
D7
D6
D5
D4
D3
D2
D1
D0
LOAD
CLOCK
OUTPUT SHIFT REGISTER
S0
P3.0
LATCH
RXD
PIN
RECEIVE DATA BUFFER
WRRD
D7
D6
D5
D4
D3
D2
D1
D0
CLOCK
RECEIVE SHIFT REGISTER
SI
READ
SERIAL
BUFFER
BAUD
CLOCK
LOAD
SERIAL
BUFFER
RECEIVE
BUFFER
LOAD
DATA
CLOCK
INTS
SERIAL I/O
CONTROL
SHIFT
R1
FLAG =
SCONx.0
T1
FLAG =
SCONx.1
SERIAL
INTERRUPT
DIVIDE
BY 4
LDSBUF
RDSBUF
TRANSMIT TIMING
LDSBUF
SHIFT
WRITE TO SBUF
RXD
(DATA OUT)
D0 D1 D2 D3 D4 D5 D6 D7
TXD
(DATA CLOCK)
TI
RECEIVE TIMING
RDSBUF
SHIFT
WRITE TO SCON
(
CLEAR RI
)
RXD
(DATA IN)
TXD
(DATA CLOCK)
RI
D0 D1 D2 D3 D4 D5 D6 D7
SBUF
OSC
0 1
DATA BUS
SM2=
SCONx.5
TXD
PIN
- TABLE OF CONTENTS 2
- LIST OF FIGURES 7
- LIST OF TABLES 8
- 1. INTRODUCTION 9
- 2. ORDERING INFORMATION 10
- 3. ARCHITECTURE 11
- 3.1 ALU 11
- Rev: 062210 12 of 176 12
- 3.2.16 Interrupts 13
- 3.2.17 Timing Control 13
- 3.2.18 Real-Time Clock 13
- 3.2.19 Feature Summary 13
- 4. PROGRAMMING MODEL 14
- 4.1 Memory Organization 14
- Rev: 062210 15 of 176 15
- Figure 4-2. Register Map 16
- Rev: 062210 17 of 176 17
- Rev: 062210 18 of 176 18
- Rev: 062210 19 of 176 19
- Rev: 062210 20 of 176 20
- Rev: 062210 21 of 176 21
- Rev: 062210 22 of 176 22
- Rev: 062210 23 of 176 23
- Rev: 062210 24 of 176 24
- 4.2.1 Port 0 (P0) 25
- 4.2.2 Stack Pointer (SP) 25
- Rev: 062210 26 of 176 26
- 4.2.8 Power Control (PCON) 27
- INT1 pin 28
- INT0 is level triggered 28
- Rev: 062210 29 of 176 29
- 4.2.11 Timer 0 LSB (TL0) 30
- 4.2.12 Timer 1 LSB (TL1) 30
- 4.2.13 Timer 0 MSB (TH0) 30
- 4.2.14 Timer 1 MSB (TH1) 30
- Rev: 062210 31 of 176 31
- 4.2.16 Port 1 (P1) 32
- RG bit 33
- Rev: 062210 34 of 176 34
- 4.2.21 Port 2 (P2) 36
- 7 6 5 4 3 2 1 0 37
- 4.2.25 Port 3 (P3) 38
- Rev: 062210 41 of 176 41
- RMS2, RMS1 42
- DME1, DME0 44
- LB3, LB2, LB1 44
- Rev: 062210 45 of 176 45
- CP/RL2 EXEN2 DCEN RESULT 46
- 4.2.36 Timer 2 Mode (T2MOD) 47
- 4.2.39 Timer 2 LSB (TL2) 48
- 4.2.40 Timer 2 MSB (TH2) 48
- Rev: 062210 49 of 176 49
- Rev: 062210 51 of 176 51
- 4.2.45 B Register (B) 52
- Rev: 062210 53 of 176 53
- Rev: 062210 54 of 176 54
- Rev: 062210 55 of 176 55
- Rev: 062210 56 of 176 56
- Rev: 062210 57 of 176 57
- 4.3 Instruction Timing 58
- 4.4 Addressing Modes 59
- 4.4.2 Direct Addressing 60
- 4.4.4 Immediate Addressing 61
- 4.4.6 Relative Addressing 61
- 4.4.7 Page Addressing 61
- 4.5 Program Status Flags 62
- Rev: 062210 63 of 176 63
- 5.6 Instruction Timing 64
- Rev: 062210 65 of 176 65
- Memory Access 66
- Rev: 062210 67 of 176 67
- 22h 68
- Rev: 062210 69 of 176 69
- Rev: 062210 70 of 176 70
- 5.7 Comparison to the 8051 71
- Rev: 062210 72 of 176 72
- Rev: 062210 73 of 176 73
- Rev: 062210 74 of 176 74
- Rev: 062210 75 of 176 75
- 6. MEMORY ACCESS 76
- 6.1 Internal Program Memory 76
- 6.2 Internal Data Memory 76
- 6.2.1 ROMSIZE Feature 77
- RMS2 RMS1 RMS0 78
- MAX ON-CHIP ROM 78
- Rev: 062210 79 of 176 79
- Rev: 062210 80 of 176 80
- 6.5 Data Memory Access 81
- Rev: 062210 82 of 176 82
- Rev: 062210 83 of 176 83
- 6.6 Data Memory Timing 84
- CKCON.2–0 85
- Rev: 062210 86 of 176 86
- C1 C2 C3 C4 87
- 7. POWER MANAGEMENT 88
- Precision Voltage Monitor 88
- 7.1.2 Power-Fail Reset 89
- 7.1.3 Power-On Reset 89
- 7.1.4 Bandgap Select 89
- Rev: 062210 90 of 176 90
- 7.1.5 Watchdog Wake-Up 91
- Rev: 062210 92 of 176 92
- 7.2 Power Conservation 93
- Rev: 062210 94 of 176 94
- 7.3 Power Management Modes 95
- Rev: 062210 96 of 176 96
- Rev: 062210 97 of 176 97
- 7.3.3 Switchback 98
- Rev: 062210 99 of 176 99
- Rev: 062210 100 of 176 100
- RG bit. The procedure to 101
- 8. RESET CONDITIONS 102
- 8.1 Reset Sources 102
- 8.2 Reset State 103
- 8.3 No-Battery Reset 103
- 8.4 In-System Disable Mode 104
- 9.1 Interrupt Overview 105
- 9. INTERRUPTS 105
- 9.2 Interrupt Sources 106
- 9.2.2 Timer Interrupts 107
- 9.2.4 Real-Time Clock 107
- 9.2.5 Power-Fail Interrupt 107
- 9.3 Simulated Interrupts 108
- 9.4 Interrupt Priorities 108
- 9.6 Interrupt Latency 109
- Rev: 062210 110 of 176 110
- Rev: 062210 111 of 176 111
- 10. PARALLEL I/O 112
- 10.1 Port 0 112
- 10.2 Port 2 113
- 10.3 Ports 1 and 3 114
- 10.4 Output Functions 115
- 10.6 Input Functions 115
- 10.9 I/O Port Timing 116
- 10.10 Optional Functions 117
- 11. PROGRAMMABLE TIMERS 118
- 11.1 16-Bit Timers 118
- INT1 and TR1 = 119
- 11.2 Mode 0 120
- 11.3 Mode 1 121
- 11.4 Mode 2 122
- 11.5 Mode 3 123
- 11.6 Timer 2 124
- Rev: 062210 125 of 176 125
- 11.7 Timer 2 Modes 126
- T2 = 1. As 127
- TIMER 2 128
- INTERRUPT 128
- T2CON.7 128
- 11.7.5 Baud-Rate Generator 129
- RL2 = 0 130
- 11.8 Time Base Selection 131
- 11.9 Watchdog Timer 132
- Rev: 062210 133 of 176 133
- Rev: 062210 134 of 176 134
- Rev: 062210 135 of 176 135
- 12. SERIAL I/O 136
- 12.1 Serial Mode Summary 136
- 12.1.3 Mode 2 137
- 12.1.4 Mode 3 137
- Rev: 062210 138 of 176 138
- Rev: 062210 139 of 176 139
- 12.3 Baud Rates 140
- 12.3.2 Mode 2 141
- 12.3.3 Mode 1 or 3 141
- 12.4 Serial I/O Description 143
- 12.4.2 Mode 1 145
- Rev: 062210 146 of 176 146
- RECEIVE TIMING 146
- TRANSMIT TIMING 146
- 12.4.3 Mode 2 147
- REGISTER 148
- 12.4.4 Mode 3 149
- Rev: 062210 150 of 176 150
- SADDR 11110000 151
- Rev: 062210 152 of 176 152
- 13. TIMED-ACCESS PROTECTION 153
- 13.1 Protected Bits 153
- 13.2 Protection Scheme 153
- TABLE_READ: 155
- 14. REAL-TIME CLOCK 156
- 14.3 Using the RTC Alarm 158
- TRMx bits must be 160
- 15. BATTERY BACKUP 161
- 15.1 Selecting a Battery 161
- REGISTER NAME LOCATION 162
- 16. INSTRUCTION SET DETAILS 163
- Rev: 062210 164 of 176 164
- Rev: 062210 165 of 176 165
- MNEMONIC 165
- Rev: 062210 166 of 176 166
- Rev: 062210 168 of 176 168
- Rev: 062210 169 of 176 169
- Rev: 062210 170 of 176 170
- 171 of 176 171
- 17. TROUBLESHOOTING 172
- 18.1 Technical Support 174
- 18.2 Development Tools 174
- 18.3 Software Compatibility 174
- Rev: 062210 175 of 176 175
- 2010 Maxim Integrated 176
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