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DSPIC33FJMC202ESS 数据表(PDF) 29 Page - Microchip Technology |
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DSPIC33FJMC202ESS 数据表(HTML) 29 Page - Microchip Technology |
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29 / 330 page  © 2007-2012 Microchip Technology Inc. DS70283K-page 29 dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 4.0 MEMORY ORGANIZATION The dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 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 dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 devices is 4M instructions. The space is addressable by a 24-bit value derived either from the 23-bit Program Counter (PC) during program execution, or from table operation or data space remapping as described in Section 4.8 “Interfacing Program and Data Memory Spaces”. User application 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. The memory maps for the dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 devices are shown in Figure 4-1. FIGURE 4-1: PROGRAM MEMORY MAPS FOR dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 DEVICES Note: This data sheet summarizes the features of the dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 family of devices. It is not intended to be a comprehensive reference source. To complement the information in this data sheet, refer to Section 4. “Program Memory” (DS70202) of the “dsPIC33F/PIC24H Family Reference Manual”, which is avail- able from the Microchip web site (www.microchip.com). Reset Address 0x000000 0x0000FE 0x000002 0x000100 Device Configuration User Program Flash Memory 0x005800 0x0057FE (11264 instructions) 0x800000 0xF80000 Registers 0xF80017 0xF80018 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 dsPIC33FJ32MC202/204 Reset Address 0x000000 0x0000FE 0x000002 0x000100 Device Configuration User Program Flash Memory 0x002C00 0x002BFE (5632 instructions) 0x800000 0xF80000 Registers 0xF80017 0xF80018 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 dsPIC33FJ16MC304 |
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