15-125. ECFLG Register
.......................................................................................................
15-126. ECCLR Register
.......................................................................................................
15-127. ECFRC Register
......................................................................................................
15-128. REVID Register
.......................................................................................................
15-129. Optical Encoder Disk
................................................................................................
15-130. QEP Encoder Output Signal for Forward/Reverse Movement
..................................................
15-131. Index Pulse Example
................................................................................................
15-132. Functional Block Diagram of the eQEP Peripheral
..............................................................
15-133. Functional Block Diagram of Decoder Unit
........................................................................
15-134. Quadrature Decoder State Machine
...............................................................................
15-135. Quadrature-clock and Direction Decoding
........................................................................
15-136. Position Counter Reset by Index Pulse for 1000 Line Encoder (QPOSMAX = 3999 or F9Fh)
............
15-137. Position Counter Underflow/Overflow (QPOSMAX = 4)
........................................................
15-138. Software Index Marker for 1000-line Encoder (QEPCTL[IEL] = 1)
.............................................
15-139. Strobe Event Latch (QEPCTL[SEL] = 1)
..........................................................................
15-140. eQEP Position-compare Unit
.......................................................................................
15-141. eQEP Position-compare Event Generation Points
...............................................................
15-142. eQEP Position-compare Sync Output Pulse Stretcher
..........................................................
15-143. eQEP Edge Capture Unit
...........................................................................................
15-144. Unit Position Event for Low Speed Measurement (QCAPCTL[UPPS] = 0010)
..............................
15-145. eQEP Edge Capture Unit - Timing Details
........................................................................
15-146. eQEP Watchdog Timer
..............................................................................................
15-147. eQEP Unit Time Base
...............................................................................................
15-148. EQEP Interrupt Generation
.........................................................................................
15-149. eQEP Position Counter Register (QPOSCNT)
....................................................................
15-150. eQEP Position Counter Initialization Register (QPOSINIT)
.....................................................
15-151. eQEP Maximum Position Count Register (QPOSMAX)
.........................................................
15-152. eQEP Position-Compare Register (QPOSCMP)
..................................................................
15-153. eQEP Index Position Latch Register (QPOSILAT)
...............................................................
15-154. eQEP Strobe Position Latch Register (QPOSSLAT)
.............................................................
15-155. eQEP Position Counter Latch Register (QPOSLAT)
.............................................................
15-156. eQEP Unit Timer Register (QUTMR)
...............................................................................
15-157. eQEP Unit Period Register (QUPRD)
..............................................................................
15-158. eQEP Watchdog Timer Register (QWDTMR)
.....................................................................
15-159. eQEP Watchdog Period Register (QWDPRD)
....................................................................
15-160. QEP Decoder Control Register (QDECCTL)
......................................................................
15-161. eQEP Control Register (QEPCTL)
.................................................................................
15-162. eQEP Capture Control Register (QCAPCTL)
.....................................................................
15-163. eQEP Position-Compare Control Register (QPOSCTL)
.........................................................
15-164. eQEP Interrupt Enable Register (QEINT)
..........................................................................
15-165. eQEP Interrupt Flag Register (QFLG)
..............................................................................
15-166. eQEP Interrupt Clear Register (QCLR)
............................................................................
15-167. eQEP Interrupt Force Register (QFRC)
............................................................................
15-168. eQEP Status Register (QEPSTS)
...................................................................................
15-169. eQEP Capture Timer Register (QCTMR)
..........................................................................
15-170. eQEP Capture Period Register (QCPRD)
.........................................................................
15-171. eQEP Capture Timer Latch Register (QCTMRLAT)
..............................................................
15-172. eQEP Capture Period Latch Register (QCPRDLAT)
.............................................................
15-173. eQEP Revision ID Register (REVID)
...............................................................................
39
SPRUH73H – October 2011 – Revised April 2013
List of Figures
Copyright © 2011–2013, Texas Instruments Incorporated