SW500010 Microchip Technology, SW500010 Datasheet - Page 72

• Manufacturer Part Number: SW500010
• Description: HI-TECH C PRO FOR PIC10/12/16
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC10/12/16r

Specifications of SW500010

• Supported Families: PIC10, PIC12, PIC16
• Core Architecture: PIC
• Software Edition: Professional
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC10/12/16
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: PIC10, PIC12, PIC14, PIC16, PIC16E
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 019P; 778-1006; 778-1006

Processor-related Features
used after including pic.h.
This will load the appropriate value into the W register and then call the tris instruction.
TRISA, TRISB and TRISC, depending on the exact number of ports available. This objects are
used in the same manner as described above.
3.2.7.3 Calibration Space
The Microchip-modified IEEE754 32-bit floating point format parameters in the calibration space
in the PIC14000 processor may be accessed using the get_cal_data() function. The byte parameters
may be accessed directly using the identifiers defined in the header file.
3.2.7.4 Oscillator calibration constants
Some PIC devices come with an oscillator calibration constant which is pre-programmed into the
devices program memory. This constant can be read and written to the OSCCAL register to calibrate
the internal RC oscillator. On some baseline PIC devices the calibration constant is stored as a movlw
instruction at the top of program memory, e.g. the 12C50X and 16C505 parts. On reset the program
counter is made to point to this instruction and it is executed first before the program counter wraps
around to 0x0000 which is the effective reset vector for the device. The HI-TECH C PRO for the
PIC10/12/16 MCU Family compiler default startup routine will automatically include code to load
the OSCCAL register with the value contained in the W register after reset on such devices. No
other code is required by the programmer.
memory, but as a retlw instruction. The compiler’s startup code will automatically generate code to
retrieve this value and do the configuration. This feature can be turned off via the –RUNTIME
option.
to use this macro, make sure that <htc.h> is included into the relevant modules of your program.
This macro returns the calibration constant which can then be stored into the OSCCAL register, as
follows:
The location which stores the calibration constant is never code protected and will be lost if you re-
program the device. Thus, if you are using a windowed or flash device, the calibration constant must
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For example, to make all the bits on the output port high impedance, the following code can be
Those PIC devices which have more than one output port may have definitions for objects:
For other chips, such as 12C67X chips, the oscillator constant is also stored at the top of program
At runtime this value may be read using the macro _READ_OSCCAL_DATA(). To be able
TRIS = 0xFF;
OSCCAL = _READ_OSCCAL_DATA();
C Language Features