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Northern Software Supported Devices PIC16F PIC16F1454 PIC16F1455 PIC16F1459 PIC16F1503 PIC16F1507 PIC16F1508 PIC16F1509 PIC16F1512 PIC16F1513 PIC16F1516 PIC16F1517 PIC16F1518 PIC16F1519 PIC16F15213 PIC16F15214 PIC16F15223 PIC16F15224 PIC16F15225 PIC16F15243 PIC16F15244 PIC16F15245 PIC16F1526 PIC16F1527 PIC16F15313 PIC16F15323 PIC16F15324 PIC16F15325 PIC16F15344 PIC16F15345 PIC16F15354 PIC16F15355 PIC16F15356 PIC16F15375 PIC16F15376 PIC16F15385 PIC16F15386 PIC16F1574 PIC16F1575 PIC16F1578 PIC16F1579 PIC16F1613 PIC16F1614 PIC16F1615 PIC16F1618 PIC16F1619 PIC16F1703 PIC16F1704 PIC16F1705 PIC16F1707 PIC16F1708 PIC16F1709 PIC16F1713 PIC16F1716 PIC16F1717 PIC16F1718 PIC16F1719 PIC16F1764 PIC16F1765 PIC16F1768 PIC16F1769 PIC16F1773 PIC16F1776 PIC16F1777 PIC16F1778 PIC16F1779 PIC16F1782 PIC16F1783 PIC16F1784 PIC16F1786 PIC16F1787 PIC16F1788 PIC16F1789 PIC16F1823 PIC16F1824 PIC16F1825 PIC16F1826 PIC16F1827 PIC16F1828 PIC16F1829 PIC16F1829LIN PIC16F18313 PIC16F18323 PIC16F18324 PIC16F18325 PIC16F18326 PIC16F18344 PIC16F18345 PIC16F18346 PIC16F18424 PIC16F18425 PIC16F18426 PIC16F18444 PIC16F18445 PIC16F18446 PIC16F18455 PIC16F18456 PIC16F1847 PIC16F18854 PIC16F18855 PIC16F18856 PIC16F18857 PIC16F18875 PIC16F18876 PIC16F18877 PIC16F19155 PIC16F19156 PIC16F19175 PIC16F19176 PIC16F19185 PIC16F19186 PIC16F19195 PIC16F19196 PIC16F19197 PIC16F1933 PIC16F1934 PIC16F1936 PIC16F1937 PIC16F1938 PIC16F1939 PIC16F1946 PIC16F1947 PIC16F505 PIC16F506


PIC16F527 PIC16F570 PIC16F610 PIC16F616 PIC16F627 PIC16F627A PIC16F628 PIC16F628A PIC16F630 PIC16F631 PIC16F636 PIC16F639 PIC16F648A PIC16F676 PIC16F677 PIC16F684 PIC16F685 PIC16F687 PIC16F688 PIC16F689 PIC16F690 PIC16F707 PIC16F716 PIC16F720 PIC16F721 PIC16F722 PIC16F722A PIC16F723 PIC16F723A PIC16F724 PIC16F726 PIC16F727 PIC16F753 PIC16F785 PIC16F818 PIC16F819 PIC16F84A PIC16F87 PIC16F870 PIC16F871 PIC16F872 PIC16F873 PIC16F873A PIC16F874 PIC16F874A PIC16F876 PIC16F876A PIC16F877 PIC16F877A PIC16F88 PIC16F882 PIC16F883 PIC16F884 PIC16F886 PIC16F887 PIC16F913 PIC16F914 PIC16F916 PIC16F917 PIC16F946


Support summary

  • Programming - Only with NSHVX
  • Debugging provisions - No
ICSP connection


ICSP Connection

Programming is impossible at voltages below 4.5V.

PIC16F526 can only be programmed with HVP (High Voltage Programming). This means it requires Vpp voltage (higher than Vdd) for programming. NSDSP cannot generate such voltages. Therefore, PIC16F526 requires NSHVX High Voltage Extension or an external HVP circuit.


No device id

PIC16F526 does not have a device id. Therefore NSDSP cannot determine if it is connected to PIC16F526 or to a different device. Moreover, it is impossible to determine if NSDSP is connected to any device at all. Therefore, NSDSP will proceed with programming assuming that it is connected to PIC16F526.

With other devices, NSDSP uses device id to determine the optimal connection speed. Since the device id is missing on PIC16F526, NSDSP will always program at the maximum allowed speed.


OSCCAL calibration word

PIC16F526 requires an OSCCAL calibration word. This word is stored in program memory at the address 0x03ff. NSDSP will read the calibration word before programming and will restore it back after programming. However, if the HEX file contains data for address 0x03ff, NSDSP will not override the data with the calibration word.

PIC16F526 also stores a backup copy of factory calibration word. NSDSP may use this backup copy to replace calibration word if necessary. The backup copy will persist through bulk erase. However, when user id information is erased, the backup calibration word will be erased too and NSDSP will have to restore it after programming.

Since the calibration information must be erased and written back, any adverse event during programming operation (such as power outage) may cause the loss of calibration information.

If the PIC device does not contain the correct calibration word, NSDSP will refuse to program. In such case, you can restore the calibration word using nsprog, for example:

nsprog e -d PIC16F526 -c cxx

where "cxx" should be replaced with the desired calibration word in hexadecimal format.

When reading from PIC16F526, NSDSP does not read the OSCCAL calibration information, however the calibration information can be retrieved with nsread, for example:

nsread 03ff 0400 -d PIC16F526


Programming Benchmarks

We have measured time necessary to program and verify PIC16F526.

Operation Time
Programming and Verification 1.6s
Programming only 1.5s
Verification only 0.2s

The measurements reflect the time necessary to program/verify the entire chip, including all user programmable memory areas and very slow data EEPROM.



NSDSP cannot be used to debug PIC16F526.



Microchip PIC16F526 page

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