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Field
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Description
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Register Files
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dest
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Destination either the WREG register or the specified register file location. See d.
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f
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Register file address.
f 8-bit (0x00 to 0xFF).
f' 12-bit (0x000 to 0xFFF). This is the source address.
f" 12-bit (0x000 to 0xFFF). This is the destination address.
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r
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0, 1 or 2 for FSR number.
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x
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Don't care (`0' or `1').
The assembler will generate code with x = 0. It is the recommended form of use for compatibility
with all Microchip software tools.
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Literals
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k
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Literal field, constant data or label.
k 4-bit.
kk 8-bit.
kkk 12-bit.
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Offsets, Increments/Decrements
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n
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The relative address (2's complement number) for relative branch instructions, or the direct
address for Call/Branch and Return instructions.
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*
*+
*-
+*
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The mode of the TBLPTR register for the table read and table write instructions.
Only used with table read (TBLRD) and table write (TBLWT) instructions:
No Change to register
Post-Increment register
Post-Decrement register
Pre-Increment register
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Bits
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a
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RAM access bit
a = 0: RAM location in Access RAM (BSR register is ignored)
a = 1: RAM bank is specified by BSR register (default)
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b
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Bit address within an 8-bit file register (0 to 7).
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d
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Destination select bit
d = 0: store result in WREG
d = 1: store result in file register f (default)
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s
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Fast Call/Return mode select bit
s = 0: do not update into/from shadow registers (default)
s = 1: certain registers loaded into/from shadow registers (Fast mode)
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' '
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Bit values, as opposed to Hex value.
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Named Registers
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BSR
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Bank Select Register. Used to select the current RAM bank.
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FSR
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File Select Register.
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PCL
|
Program Counter Low Byte.
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PCH
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Program Counter High Byte.
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PCLATH
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Program Counter High Byte Latch.
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PCLATU
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Program Counter Upper Byte Latch.
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PRODH
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Product of Multiply High Byte.
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PRODL
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Product of Multiply Low Byte.
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STATUS
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Status Register
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TABLAT
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8-bit Table Latch.
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TBLPTR
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21-bit Table Pointer (points to a Program Memory location).
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WREG
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Working register (accumulator).
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Named Bits
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C, DC, Z, OV, N
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ALU Status bits: Carry, Digit Carry, Zero, Overflow, Negative.
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TO
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Time-out bit.
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PD
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Power-down bit.
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PEIE
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Peripheral Interrupt Enable bit.
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GIE, GIEL/H
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Global Interrupt Enable bit(s).
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Named Device Features
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MCLR
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Master clear device reset.
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PC
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Program Counter.
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TOS
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Top-of-Stack.
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WDT
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Watchdog Timer.
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Misc. Descriptors
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( )
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Contents.
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→
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Assigned to.
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< >
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Register bit field.
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