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DSP56364 24-Bit Digital Signal Processor Users Manual, Rev. 2
Freescale Semiconductor 3-1
3 Memory Configuration
3.1 Memory Spaces
The DSP56364 provides the following three independent memory spaces:
•Program
• X data
• Y data
Each memory space uses (by default) 18 external address lines for addressing, allowing access to 256K of
external memory when using the SRAM operating mode, and 16 M when using the DRAM operating
mode. Program and data word length is 24 bits, and internal memory uses 24-bit addressing.
The DSP56364 provides a 16-bit compatibility mode that effectively uses 16-bit addressing for each
memory space, allowing access to 64K of memory for each. This mode puts zeros in the most significant
byte of the usual (24-bit) program and data word and ignores the zeroed byte, thus effectively using 16-bit
program and data words. The 16-bit Compatibility mode allows the DSP56364 to use 56000 object code
without change (thus minimizing system cost for applications that use the smaller address space). See the
DSP56300 Family Manual, Section 6.4, for further information.
3.1.1 Program Memory Space
Program memory space consists of the following:
• Internal program memory, consisting of program RAM, 0.5K by default, and program ROM, 8K
x 24-bit
• Bootstrap program ROM (192 x 24-bit)
3.1.1.1 Program RAM
On-chip program RAM occupies the lowest 0.5K (default) or 1.25K locations in the program memory
space (depending on the setting of the MS bit). The program RAM default organization is 2 banks of 256
24-bit words (0.5K). The upper 3 banks of Y data RAM can be configured as program RAM by setting the
MS bit.
3.1.1.2 Program ROM
The program ROM contains customer-supplied code. For further information on supplying code for a
customized DSP56364 program ROM, please contact your Freescale regional sales office.
The last 128 words ($FF2F80-$FF2FFF) of the program ROM are reserved for Freescale use. This
memory area is reserved for use as expansion area for the bootstrap ROM as well as for testing purposes.
- Processor 1
- Contents 3
- 3 Memory Configuration 4
- 4 Core Configuration 4
- Freescale Semiconductor v 5
- Freescale Semiconductor vii 7
- BookTitle, Rev. # 10
- List of Figures 11
- List of Tables 13
- Freescale Semiconductor xv 15
- Manual Conventions 16
- Freescale Semiconductor xvii 17
- 1 Overview 19
- 1.2 Features 20
- Audio Processor Architecture 21
- Freescale Semiconductor 1-3 21
- 1.5.1 Data ALU 22
- 1.5.1.1 Data ALU Registers 23
- 1.5.4 Internal Buses 24
- Freescale Semiconductor 1-7 25
- 1.6.3 Bootstrap ROM 26
- 1.6.1 Reserved Memory Spaces 26
- 1.6.5 External Memory Support 27
- 1.8 Status Register (SR) 28
- 2.1 Signal Groupings 29
- DSP56364 30
- 2.2 Power 31
- 2.3 Ground 31
- 2.5.1 External Address Bus 32
- 2.5.2 External Data Bus 33
- 2.5.3 External Bus Control 33
- After RESET 34
- 2.7 Serial Host Interface 35
- 2.9 JTAG/OnCE Interface 41
- 2.10 GPIO Signals 42
- 3.1.1 Program Memory Space 43
- 3.1.2 Data Memory Spaces 44
- 3.1.2.2 X Data RAM 45
- 3.1.2.3 Y Data Memory Space 45
- 3.1.2.4 Y Data RAM 45
- 3.3.1 RAM Locations 46
- 3.3.2 ROM Locations 46
- Internal Memory Configuration 47
- Freescale Semiconductor 3-5 47
- 3.4 Memory Maps 48
- Memory Maps 49
- Freescale Semiconductor 3-7 49
- 3.5 External Memory Support 50
- 3.6 Internal I/O Memory Map 50
- 4.2.1 Mode C (MC) - Bit 2 52
- 4.3 Operating Modes 53
- 4.4 Bootstrap Program 54
- Interrupt Priority Registers 56
- 4-6 Freescale Semiconductor 56
- 4.6 DMA Request Sources 57
- 4.7 PLL and Clock Generator 57
- 5.1 Introduction 61
- 5.2 GPIO Programming Model 61
- GPIO Programming Model 64
- 5-4 Freescale Semiconductor 64
- 6.1 Introduction 65
- Introduction 66
- 6-2 Freescale Semiconductor 66
- ESAI Data and Control Pins 67
- Freescale Semiconductor 6-3 67
- 6-4 Freescale Semiconductor 68
- 6.3 ESAI Programming Model 71
- Figure 6-2 TCCR Register 72
- Freescale Semiconductor 6-9 73
- 6-10 Freescale Semiconductor 74
- 6-12 Freescale Semiconductor 76
- Figure 6-5 TCR Register 77
- 6-14 Freescale Semiconductor 78
- Freescale Semiconductor 6-15 79
- Normal Mode 81
- Network Mode 81
- Figure 6-14 82
- 6-20 Freescale Semiconductor 84
- Freescale Semiconductor 6-21 85
- 6-22 Freescale Semiconductor 86
- Figure 6-8 RCCR Register 87
- Figure 6-9 RCR Register 91
- 6-28 Freescale Semiconductor 92
- Freescale Semiconductor 6-31 95
- Figure 6-10 SAICR Register 96
- Freescale Semiconductor 6-33 97
- 6-34 Freescale Semiconductor 98
- Figure 6-12 SAISR Register 99
- ESAI Programming Model 100
- 6-36 Freescale Semiconductor 100
- Freescale Semiconductor 6-37 101
- 6-38 Freescale Semiconductor 102
- (a) Receive Registers 103
- (b) Transmit Registers 103
- Freescale Semiconductor 6-41 105
- Figure 6-15 TSMA Register 106
- Figure 6-16 TSMB Register 106
- Figure 6-17 RSMA Register 107
- Figure 6-18 RSMB Register 107
- 6.4.1 ESAI After Reset 108
- 6.4.2 ESAI Initialization 108
- 6.4.3 ESAI Interrupt Requests 109
- Operating Modes 110
- 6-46 Freescale Semiconductor 110
- 6.4.4.3 Frame Sync Selection 111
- 6.4.5 Serial I/O Flags 112
- Figure 6-19 PCRC Register 113
- Figure 6-20 PRRC Register 113
- Figure 6-21 PDRC Register 114
- ESAI Initialization Examples 115
- Freescale Semiconductor 6-51 115
- 6-52 Freescale Semiconductor 116
- 7 Serial Host Interface 117
- 7-2 Freescale Semiconductor 118
- 7.3 SHI Clock Generator 119
- 7-4 Freescale Semiconductor 120
- 7-6 Freescale Semiconductor 122
- 7.4.4.2 HSAR I 123
- 7-8 Freescale Semiconductor 124
- Freescale Semiconductor 7-9 125
- Table 7-4 SHI Data Size 127
- Freescale Semiconductor 7-15 131
- 7.5 SPI Bus Characteristics 132
- 7.6.1 Overview 133
- C Bus Characteristics 134
- 7-18 Freescale Semiconductor 134
- C Data Transfer Formats 135
- 7.7.1 SPI Slave Mode 136
- 7.7.2 SPI Master Mode 137
- C Slave Mode 137
- 7.7.3.1 Receive Data in I 138
- C Master Mode 139
- 7.7.4.1 Receive Data in I 140
- 7.7.4.2 Transmit Data In I 141
- 7-26 Freescale Semiconductor 142
- Appendix A Bootstrap ROM 143
- A-2 Freescale Semiconductor 144
- Freescale Semiconductor A-3 145
- A-4 Freescale Semiconductor 146
- Freescale Semiconductor A-5 147
- A-6 Freescale Semiconductor 148
- Freescale Semiconductor A-7 149
- A-8 Freescale Semiconductor 150
- Appendix B BDSL File 151
- B-2 Freescale Semiconductor 152
- Freescale Semiconductor B-3 153
- B-4 Freescale Semiconductor 154
- Freescale Semiconductor B-5 155
- B-6 Freescale Semiconductor 156
- C.1.1 Peripheral Addresses 157
- C.1.2 Interrupt Addresses 157
- C.1.3 Interrupt Priorities 157
- Programmer’s Reference 158
- C.2 Programming Sheets 164
- Central Processor 165
- =Reserved, program as 1 166
- CENTRAL PROCESSOR 167
- C-12 Freescale Semiconductor 168
- Bits XTLR and 169
- C-14 Freescale Semiconductor 170
- SHI Host Receive 171
- C-16 Freescale Semiconductor 172
- X: $FFFFB6 Reset: $000000 173
- X: $FFFFB5 Reset: $000000 174
- X: $FFFFB8 Reset: $000000 175
- X: $FFFFB7 Reset: $000000 176
- X: $FFFFB4 Reset: $000000 177
- SAISR - ESAI Status Register 178
- X: $FFFFB3 Reset $000000 178
- Freescale Semiconductor C-23 179
- C-24 Freescale Semiconductor 180
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