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EP7309/11/12 User’s Manual - DS508UM4 5-1
Copyright Cirrus Logic, Inc. 2003
55
5
Chapter 5
5System Registers
Introduction
The SYSCON and SYSFLG registers control and report the status of the various
components of the EP73xx system-on-chip device. There are three read/write
SYSCON system configuration registers, and two SYSFLG read only system flag
registers.
Features
The system registers affect aspects of the following features and peripherals:
• Keyboard scanner
•Timers
• UART/SIR control
• Buzzer output control
•Debugmodeselect
• SSI/CODEC/DAI/ADC
•LCD
• Expansion clock
•Wakeupcontrol
•SDRAM
•OStimercontrol
•
RUN/CLKEN select
• Clock speed/wait state select
•Version
• Media change detect
•Powerstatus
• RTC subdivide
• Boot mode status
•PartID
•VersionID
• MaverickKey Unique-ID
- 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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