Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 20 16-Bit 40 null I/O number 15

161

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170

dsPIC33FJ12MC201/202

R/W-0 U-0 R/W-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0

CNTERR

— QEISIDL INDEX UPDN QEIM<2:0>

bit 15 bit 8

R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0

SWPAB PCDOUT TQGATE TQCKPS<1:0> POSRES TQCS UPDN_SRC

bit 7 bit 0

Legend:

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 15 CNTERR: Count Error Status Flag bit

1 = Position count error has occurred

0 = No position count error has occurred

Note: CNTERR flag only applies when QEIM<2:0> = ‘110’ or ‘100’.

bit 14 Unimplemented: Read as ‘0’

bit 13 QEISIDL: Stop in Idle Mode bit

1 = Discontinue module operation when device enters Idle mode

0 = Continue module operation in Idle mode

bit 12 INDEX: Index Pin State Status bit (Read-Only)

1 = Index pin is High

0 = Index pin is Low

bit 11 UPDN: Position Counter Direction Status bit

1 = Position Counter Direction is positive (+)

0 = Position Counter Direction is negative (-)

(Read-only bit when QEIM<2:0> = ‘1XX’)

(Read/Write bit when QEIM<2:0> = ‘001’)

bit 10-8 QEIM<2:0>: Quadrature Encoder Interface Mode Select bits

111 = Quadrature Encoder Interface enabled (x4 mode) with position counter reset by match

(MAXCNT)

110 = Quadrature Encoder Interface enabled (x4 mode) with Index Pulse reset of position counter

101 = Quadrature Encoder Interface enabled (x2 mode) with position counter reset by match

(MAXCNT)

100 = Quadrature Encoder Interface enabled (x2 mode) with Index Pulse reset of position counter

011 = Unused (Module disabled)

010 = Unused (Module disabled)

001 = Starts 16-bit Timer

000 = Quadrature Encoder Interface/Timer off

bit 7 SWPAB: Phase A and Phase B Input Swap Select bit

1 = Phase A and Phase B inputs swapped

0 = Phase A and Phase B inputs not swapped

bit 6 PCDOUT: Position Counter Direction State Output Enable bit

1 = Position Counter Direction Status Output Enable (QEI logic controls state of I/O pin)

0 = Position Counter Direction Status Output Disabled (Normal I/O pin operation)

bit 5 TQGATE: Timer Gated Time Accumulation Enable bit

1 = Timer gated time accumulation enabled

0 = Timer gated time accumulation disabled