PIC16F887 Limitations

PIC16F887, PIC16F886, PIC16F884, PIC16F883, PIC16F882

This device family does not require a header for debug and none is available. Device limitations are as follows:

  • General Debug Limitations
  • General Programming Limitations
  • You cannot single step through an interrupt. Due to hardware restrictions, the debugger/emulator cannot jump to the interrupt vector memory location in Single Step mode.
  • RB3/PGM pin must be low for ICSP. On PIC16F88X devices it is necessary to pull the RB3/PGM pin low for in-circuit serial programming. This is due to a silicon issue.
  • BF is cleared when SSPBUF is interrogated by software.
  • RCIF is cleared when RCREG is interrogated by software.
  • RBIF is cleared when PORT is interrogated by software, except when Freeze on Halt is enabled.
  • Clearing OPTION_REG<7> (weak pull-ups) causes debug operations to hang. Keep this bit set when using debug.

Freeze on Halt Limitations

  • Timer0 will not freeze using the internal clock.
  • CMOUTx pins do not freeze, status bits and interrupt flags do freeze.

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