Datasheet

dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
DS70000657H-page 350  2011-2013 Microchip Technology Inc.
24.4 Step Commands and Format
TABLE 24-1: PTG STEP COMMAND FORMAT
Step Command Byte:
STEPx<7:0>
CMD<3:0> OPTION<3:0>
bit 7 bit 4 bit 3 bit 0
bit 7-4
CMD<3:0>
Step
Command
Command Description
0000 PTGCTRL Execute control command as described by OPTION<3:0>.
0001 PTGADD Add contents of PTGADJ register to target register as described by
OPTION<3:0>.
PTGCOPY Copy contents of PTGHOLD register to target register as described by
OPTION<3:0>.
001x PTGSTRB Copy the value contained in CMD<0>:OPTION<3:0> to the CH0SA<4:0> bits
(AD1CHS0<4:0>).
0100 PTGWHI Wait for a low-to-high edge input from the selected PTG trigger input as
described by OPTION<3:0>.
0101 PTGWLO Wait for a high-to-low edge input from the selected PTG trigger input as
described by OPTION<3:0>.
0110 Reserved Reserved.
0111 PTGIRQ Generate individual interrupt request as described by OPTION3<:0>.
100x PTGTRIG Generate individual trigger output as described by <<CMD<0>:OPTION<3:0>>.
101x PTGJMP Copy the value indicated in <<CMD<0>:OPTION<3:0>> to the Queue Pointer
(PTGQPTR) and jump to that Step queue.
110x PTGJMPC0 PTGC0 = PTGC0LIM: Increment the Queue Pointer (PTGQPTR).
PTGC0
 PTGC0LIM: Increment Counter 0 (PTGC0) and copy the value
indicated in <<CMD<0>:OPTION<3:0>> to the Queue Pointer (PTGQPTR),
and jump to that Step queue
111x PTGJMPC1 PTGC1 = PTGC1LIM: Increment the Queue Pointer (PTGQPTR).
PTGC1  PTGC1LIM: Increment Counter 1 (PTGC1) and copy the value
indicated in <<CMD<0>:OPTION<3:0>> to the Queue Pointer (PTGQPTR),
and jump to that Step queue.
Note 1: All reserved commands or options will execute but have no effect (i.e., execute as a NOP instruction).
2: Refer to Table 24-2 for the trigger output descriptions.
3: This feature is only available on dsPIC33EPXXXMC20X/50X and PIC24EPXXXMC20X devices.