DSPIC33FJ64GS406 datasheet(258/456 Pages) MICROCHIP

258 / 456 page

dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610

DS70591E-page 258

 2009-2012 Microchip Technology Inc.

QEIxCON: QEIx CONTROL REGISTER (x = 1 or 2)

R/W-0

U-0

R/W-0

R-0

R/W-0

CNTERR(1)

—

QEISIDL

INDEX

UPDN(2)

QEIM<2:0>

bit 15

bit 8

R/W-0

SWPAB

PCDOUT

TQGATE

TQCKPS<1:0>(3)

POSRES(4)

TQCS

UPDN_SRC(5)

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)

1 = Position count error has occurred

0 = No position count error has occurred

bit 14

Unimplemented: Read as ‘0’

bit 13

QEISIDL: QEIx Stop in Idle Mode bit

1 = Discontinues module operation when device enters Idle mode

0 = Continues 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(2)

1 = Position counter direction is positive (+)

0 = Position counter direction is negative (-)

bit 10-8

QEIM<2:0>: Quadrature Encoder Interface Mode Select bits

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

(MAXxCNT)

110 = Quadrature Encoder Interface is enabled (x4 mode) with the Index Pulse Reset of the position

counter

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

(MAXxCNT)

100 = Quadrature Encoder Interface is enabled (x2 mode) with the Index Pulse Reset of the 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 are swapped

0 = Phase A and Phase B inputs are not swapped

bit 6

PCDOUT: Position Counter Direction State Output Enable bit

1 = Position counter direction status output is enabled (QEI logic controls state of I/O pin)

0 = Position counter direction status output is disabled (normal I/O pin operation)

Note 1: CNTERR flag only applies when QEIM<2:0> = 110 or 100.

2: Read-only bit when QEIM<2:0> = 1xx. Read/write bit when QEIM<2:0> = 001.

3: Prescaler utilized for 16-Bit Timer mode only.

4: This bit applies only when QEIM<2:0> = 100 or 110.

5: When configured for QEI mode, this control bit is a ‘don’t care’.

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