DSPIC33FJ64MC508 Microchip Technology Inc., DSPIC33FJ64MC508 Datasheet - Page 187

• Manufacturer Part Number: DSPIC33FJ64MC508
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

16.0
FIGURE 16-1:
© 2007 Microchip Technology Inc.
Note:
UPDN
INDX
QEA
QEB
QUADRATURE ENCODER
INTERFACE (QEI) MODULE
This data sheet summarizes the features
of this group of dsPIC33FJXXXMCX06/
X08/X10 Motor Control Family devices. It
is not intended to be a comprehensive ref-
erence source. To complement the infor-
mation in this data sheet, refer to the
“dsPIC33F Family Reference Manual”.
Refer
(www.microchip.com)
dsPIC33F
chapters.
Synchronize
Sleep Input
Det
PCDOUT
dsPIC33FJXXXMCX06/X08/X10 MOTOR CONTROL FAMILY
to
UPDN_SRC
QUADRATURE ENCODER INTERFACE BLOCK DIAGRAM
Programmable
Programmable
0
1
Programmable
0
1
Digital Filter
Digital Filter
Digital Filter
the
family
QEICON<11>
Existing Pin Logic
Up/Down
3
Microchip
QEIM<2:0>
reference
for
T
CY
Interface Logic
the
Quadrature
TQCS
web
Encoder
1
0
Mode Select
QEIM<2:0>
manual
latest
site
3
TQGATE
1
0
2
This section describes the Quadrature Encoder Inter-
face (QEI) module and associated operational modes.
The QEI module provides the interface to incremental
encoders for obtaining mechanical position data.
The operational features of the QEI include the follow-
ing:
• Three input channels for two phase signals and
• 16-bit up/down position counter
• Count direction status
• Position Measurement (x2 and x4) mode
• Programmable digital noise filters on inputs
an index pulse
16-bit Up/Down Counter
Max Count Register
D
CK
Comparator/
Zero Detect
(MAXCNT)
(POSCNT)
TQCKPS<1:0>
Q
Q
1, 8, 64, 256
Prescaler
2
Reset
Equal
DS70287A-page 185
QEIIF
Event
Flag