SW500009 Microchip Technology, SW500009 Datasheet - Page 108

• Manufacturer Part Number: SW500009
• Description: HI-TECH FOR DSPIC/PIC24
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC24 & DsPICr

Specifications of SW500009

• Supported Families: PIC24
• Core Architecture: PIC, DsPIC
• Software Edition: Standard
• Kit Contents: Software And Docs
• Tool Type: Compiler
• Mcu Supported Families: PIC24 MCUs And DsPIC DSCs
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: DSPIC3X/PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 025; 778-1003; 778-1003

HI-TECH C Assembly Language
Some examples of the use of the PSECT directive follow:
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A psect defined as global will be combined with other global psects of the same name from
other modules at link time. This is the default behaviour for psects, unless the local flag is
used.
The limit flag specifies a limit on the highest address to which a psect may extend.
A psect defined as local will not be combined with other local psects at link time, even if
there are others with the same name. Where there are two local psects in the one module,
they reference the same psect. A local psect may not have the same name as any global
psect, even one in another module.
A psect defined as ovrld will have the contribution from each module overlaid, rather than
concatenated at runtime. ovrld in combination with abs defines a truly absolute psect, i.e. a
psect within which any symbols defined are absolute.
The pure flag instructs the linker that this psect will not be modified at runtime and may
therefore, for example, be placed in ROM. This flag is of limited usefulness since it depends
on the linker and target system enforcing it.
The reloc flag allows specification of a requirement for alignment of the psect on a particular
boundary, e.g. reloc=100h would specify that this psect must start on an address that is a
multiple of 100h.
The size flag allows a maximum size to be specified for the psect, e.g. size=100h. This will
be checked by the linker after psects have been combined from all modules.
The space flag is used to differentiate areas of memory which have overlapping addresses,
but which are distinct. Psects which are positioned in program memory and data memory may
have a different space value to indicate that the program space address zero, for example,
is a different location to the data memory address zero. Devices which use banked RAM
data memory typically have the same space value as their full addresses (including bank
information) are unique.
The with flag allows a psect to be placed in the same page with a specified psect. For example
with=text will specify that this psect should be placed in the same page as the text psect.
PSECT fred
PSECT bill,size=100h,global
PSECT joh,abs,ovrld,class=CODE,delta=2
Macro Assembler