DSPIC33EP128GS708 datasheet(229/484 Pages) MICROCHIP

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 2016-2018 Microchip Technology Inc.

DS70005258C-page 229

dsPIC33EPXXXGS70X/80X FAMILY

17.3

Step Commands and Format

TABLE 17-1:

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 CMD0:OPTION<3:0> to the CNVCHSEL<5:0> bits

(ADCON3L<5:0>)

0100

PTGWHI

Wait for a low-to-high edge input from selected PTG trigger input as described

by OPTION<3:0>

0101

PTGWLO

Wait for a high-to-low edge input from selected PTG trigger input as described

by OPTION<3:0>

0110

Reserved

0111

PTGIRQ

Generate individual interrupt request as described by OPTION<3:0>

100x

PTGTRIG

Generate individual trigger output as described by <<CMD0>:OPTION<3:0>>

101x

PTGJMP

Copy the value indicated in <<CMD0>:OPTION<3:0>> to the PTG Queue

Pointer (PTGQPTR) and jump to that Step queue

110x

PTGJMPC0

PTGC0 = PTGC0LIM: Increment the PTG Queue Pointer (PTGQPTR)

PTGC0

 PTGC0LIM: Increment PTG Counter 0 (PTGC0) and copy the value

indicated in <<CMD0>:OPTION<3:0>> to the PTG Queue Pointer (PTGQPTR)

and jump to that Step queue

111x

PTGJMPC1

PTGC1 = PTGC1LIM: Increment the PTG Queue Pointer (PTGQPTR)

PTGC1

 PTGC1LIM: Increment PTG Counter 1 (PTGC1) and copy the value

indicated in <<CMD0>:OPTION<3:0>> to the PTG 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 17-2 for the trigger output descriptions.

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