pic24hj16gp304 Microchip Technology Inc., pic24hj16gp304 Datasheet - Page 184

• Manufacturer Part Number: pic24hj16gp304
• Description: High-performance, 16-bit Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC24HJ32GP202/204 and PIC24HJ16GP304
All instructions are single word. Ceratian of them were
made double word instructions so that all the required
information is available in these 48 bits. In the second
word, the 8 MSbs are ‘0’s. If this second word is exe-
cuted as an instruction (by itself), it will execute as a
NOP.
Most single-word instructions are executed in a single
instruction cycle, unless a conditional test is true, or the
program counter is changed as a result of the instruc-
tion. In these cases, the execution takes two instruction
cycles with the additional instruction cycle(s) executed
as a NOP. Notable exceptions are the BRA (uncondi-
tional/computed branch), indirect CALL/GOTO, all table
TABLE 19-1:
DS70289A-page 182
#text
(text)
[text]
{ }
<n:m>
.b
.d
.S
.w
bit4
C, DC, N, OV, Z
Expr
f
lit1
lit4
lit5
lit8
lit10
lit14
lit16
lit23
None
PC
Slit10
Slit16
Slit6
Wb
Wd
Wdo
Wm,Wn
Wm*Wm
Wn
Field
SYMBOLS USED IN OPCODE DESCRIPTIONS
MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero
Means literal defined by “text”
Means “content of text”
Means “the location addressed by text”
Optional field or operation
Register bit field
Byte mode selection
Double Word mode selection
Shadow register select
Word mode selection (default)
4-bit bit selection field (used in word addressed instructions) ∈ {0...15}
Absolute address, label or expression (resolved by the linker)
File register address ∈ {0x0000...0x1FFF}
1-bit unsigned literal ∈ {0,1}
4-bit unsigned literal ∈ {0...15}
5-bit unsigned literal ∈ {0...31}
8-bit unsigned literal ∈ {0...255}
10-bit unsigned literal ∈ {0...255} for Byte mode, {0:1023} for Word mode
14-bit unsigned literal ∈ {0...16384}
16-bit unsigned literal ∈ {0...65535}
23-bit unsigned literal ∈ {0...8388608}; LSB must be ‘0’
Field does not require an entry, may be blank
Program Counter
10-bit signed literal ∈ {-512...511}
16-bit signed literal ∈ {-32768...32767}
6-bit signed literal ∈ {-16...16}
Base W register ∈ {W0..W15}
Destination W register ∈ { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }
Destination W register ∈
{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }
Dividend, Divisor working register pair (direct addressing)
Multiplicand and Multiplier working register pair for Square instructions ∈
{W4 * W4,W5 * W5,W6 * W6,W7 * W7}
One of 16 working registers ∈ {W0..W15}
Preliminary
reads and writes and RETURN/RETFIE instructions,
which are single-word instructions but take two or three
cycles. Certain instructions that involve skipping over the
subsequent instruction require either two or three cycles
if the skip is performed, depending on whether the
instruction being skipped is a single-word or double word
instruction. Moreover, double word moves require two
cycles. The double word instructions execute in two
instruction cycles.
Note:
Description
For more details on the instruction set,
refer to the “dsPIC30F/33F Programmer’s
Reference Manual” (DS70157).
© 2007 Microchip Technology Inc.