Cirrus-logic EP73xx Bedienungsanleitung Seite 79
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EP7309/11/12 User’s Manual - DS508UM4 6-5
Copyright Cirrus Logic, Inc. 2003
Processor Support
66
6
Note: Bold indicates active byte lane.
Values seen above are not values stored into memory but what is actually seen on the
memory bus. Given the architecture, only load and store instructions will be affected
by endianess. For more information, refer toARM Application Note 61, Big and Little
Endian Byte Addressing.
Word + 2 (H) 11223344 44 33 44 33 44 33 44 33
Word + 3 (H) 11223344 44 33 44 33 44 33 44 33
Word + 0 (B) 11223344 44 44 44 44 44 44 44 44
Word + 1 (B) 11223344 44 44 44 44 44 44 44 44
Word + 2 (B) 11223344 44 44 44 44 44 44 44 44
Word + 3 (B) 11223344 44 44 44 44 44 44 44 44
Table 6-5: Effect on Endianess on Write Operations (Continued)
Address
(W/B)
Register
Contents
Byte Lanes to Memory / Ports / Registers
Big Endian Memory Little Endian Memory
7:0 15:8 23:16 31:24 7:0 15:8 23:16 31:24
- EP73xx User’s Guide 1
- 1Contents 4
- Chapter 5. System Registers 5
- Chapter 6. Processor Support 6
- Chapter 7. SDRAM Controller 6
- Chapter 9. LCD Interface 6
- Appendix A. Boot Code 8
- Contents 9
- List of Figures 10
- List of Tables 12
- Chapter 1 15
- 1Introduction 15
- Overview 15
- Memory Map and Register List 16
- Internal Register Map 17
- Pin Description 20
- External Signal Functions 21
- Output Bi-Directional Pins 24
- Block Diagrams 25
- References 26
- Chapter 2 27
- 2CPU Core 27
- Programming Register List 27
- Programming Examples 28
- CPU Core 29
- Write Buffer 32
- CPU Register Definitions 33
- User FIQ IRQ SVC Undef Abort 34
- CPU Clocks 35
- On-Chip PLL 36
- PLL Register Descriptions 37
- CPU State Control 38
- Idle State 39
- Power Up Sequence 40
- Table 3-1: Timer Registers 43
- Timer Register Descriptions 45
- Chapter 4 47
- 4Interrupt Controller 47
- Interrupt Register List 47
- Interrupt Operation 50
- Interrupt Listing 51
- Operating State 52
- Standby State 53
- Interrupt Controller 54
- End-Of-Interrupt Locations 59
- Chapter 5 61
- 5System Registers 61
- System Register List 62
- MaverickKey 64
- Unique-ID 64
- BUZ output reflects 65
- EXPCLK is 66
- System Registers 68
- 0032-bit 71
- 1016-bit 71
- 11Reserved 71
- CLKSEL (PE[2])input,latched 72
- Chapter 6 75
- 6Processor Support 75
- Internal Boot Mode 76
- External Boot Mode 76
- CS0 and the 77
- Endianess 78
- Endian Byte Addressing 79
- Processor Support 80
- Chapter 7 81
- 7SDRAM Controller 81
- SDRAM Register List 81
- SDRAM Register Descriptions 83
- SDRAM Controller 84
- SRAM/Expansion Bus Controller 89
- Chapter 9 91
- 9LCD Interface 91
- LCD Register List 91
- LCD DMA Controller 93
- Gray Scale 94
- 4 Bits per pixel 95
- 2 Bits per pixel 95
- 1 Bit per pixel 95
- Hardware Interface 96
- Color LCDs 96
- LCD Register Descriptions 97
- (PALMSW) 98
- FBADDR) 99
- LCD Interface 100
- Operational Overview 102
- Keyboard Interface 103
- Chapter 11 105
- 11General Purpose I/O (GPIO) 105
- Introduction 105
- Features 105
- Programming Example 106
- Register Descriptions 106
- Chapter 12 107
- 12PWM Interface 107
- Block Diagram 107
- PWM Register Descriptions 109
- PWM Interface 110
- PD0 / LEDFLSH)tobetoggledata 111
- Register Definitions 112
- Chapter 14 113
- 14JTAG Interface 113
- Boundary Scan 114
- Debug Modes 115
- Debug/ICE Test Mode 116
- Hi-Z (System) Test Mode 116
- JTAG Interface 117
- ADCCLK) 121
- Bit Descriptions: 122
- (SYNCIO[6:0]) 123
- SSI Port 124
- Chapter 16 125
- 16DAI/CODEC/SSI2 125
- DAI/CODEC/SSI2 Register List 126
- DAI Interface 128
- DAI Clock Generation 129
- Master/Slave SSI2 Interface 131
- Read Back of Residual Data 132
- CODEC Sound Interface 134
- DAI Registers 135
- DAI Control Register (DAIR) 136
- Full Bit Descriptions 137
- DAI Data Register 0 (DAIDR0) 138
- DAI Data Register 1 (DAIDR1) 139
- DAI Data Register 2 (DAIDR2) 140
- DAI Status Register (DAISR) 140
- DAI/CODEC/SSI2 141
- SSI2 Registers 144
- CODEC Register 144
- SIR Encoder 150
- UART and SIR Encoder 153
- WRDLEN Word Length 153
- Appendix A 155
- ABoot Code 155
- Boot Code 156
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