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dsPIC33FJ256GP710A Datasheet(PDF) 39 Page - Microchip Technology |
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dsPIC33FJ256GP710A Datasheet(HTML) 39 Page - Microchip Technology |
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39 / 362 page  2009-2012 Microchip Technology Inc. DS70593D-page 39 dsPIC33FJXXXGPX06A/X08A/X10A 4.0 MEMORY ORGANIZATION The dsPIC33FJXXXGPX06A/X08A/X10A architecture features separate program and data memory spaces and buses. This architecture also allows the direct access of program memory from the data space during code execution. 4.1 Program Address Space The program address memory space of the dsPIC33FJXXXGPX06A/X08A/X10A devices is 4M instructions. The space is addressable by a 24-bit value derived from either the 23-bit Program Counter (PC) during program execution, or from table operation or data space remapping as described in Section 4.6 “Interfacing Program and Data Memory Spaces” . User access to the program memory space is restricted to the lower half of the address range (0x000000 to 0x7FFFFF). The exception is the use of TBLRD/TBLWT operations, which use TBLPAG<7> to permit access to the Configuration bits and Device ID sections of the configuration memory space. Memory usage for the dsPIC33FJXXXGPX06A/X08A/X10A of devices is shown in Figure 4-1. FIGURE 4-1: PROGRAM MEMORY FOR dsPIC33FJXXXGPX06A/X08A/X10A DEVICES Note: This data sheet summarizes the features of the dsPIC33FJXXXGPX06A/X08A/ X10A family of devices. However, it is not intended to be a comprehensive refer- ence source. To complement the informa- tion in this data sheet, refer to Section 3. “Data Memory” (DS70202) and Section 4. “Program Memory” (DS70203) in the “dsPIC33F/PIC24H Family Reference Manual” , which are available from the Microchip web site (www.microchip.com). Reset Address 0x000000 0x0000FE 0x000002 0x000100 Device Configuration User Program Flash Memory 0x00AC00 0x00ABFE (22K instructions) 0x800000 0xF80000 Registers 0xF80017 0xF80010 DEVID (2) 0xFEFFFE 0xFF0000 0xFFFFFE 0xF7FFFE Unimplemented (Read ‘0’s) GOTO Instruction 0x000004 Reserved 0x7FFFFE Reserved 0x000200 0x0001FE 0x000104 Alternate Vector Table Reserved Interrupt Vector Table Reset Address Device Configuration Registers DEVID (2) Unimplemented (Read ‘0’s) GOTO Instruction Reserved Reserved Alternate Vector Table Reserved Interrupt Vector Table Reset Address Device Configuration User Program Flash Memory (88K instructions) Registers DEVID (2) GOTO Instruction Reserved Reserved Alternate Vector Table Reserved Interrupt Vector Table dsPIC33FJ64GPXXXA dsPIC33FJ128GPXXXA dsPIC33FJ256GPXXXA 0x015800 0x0157FE Note: Memory areas are not shown to scale. User Program (44K instructions) Flash Memory (Read ‘0’s) Unimplemented 0x02AC00 0x02ABFE |
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