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15-125. ECFLG Register....................................................................................................... 1646
15-126. ECCLR Register....................................................................................................... 1647
15-127. ECFRC Register ...................................................................................................... 1648
15-128. REVID Register ....................................................................................................... 1649
15-129. Optical Encoder Disk ................................................................................................ 1650
15-130. QEP Encoder Output Signal for Forward/Reverse Movement.................................................. 1651
15-131. Index Pulse Example ................................................................................................ 1651
15-132. Functional Block Diagram of the eQEP Peripheral .............................................................. 1654
15-133. Functional Block Diagram of Decoder Unit ........................................................................ 1655
15-134. Quadrature Decoder State Machine............................................................................... 1657
15-135. Quadrature-clock and Direction Decoding ........................................................................ 1657
15-136. Position Counter Reset by Index Pulse for 1000 Line Encoder (QPOSMAX = 3999 or F9Fh) ............ 1659
15-137. Position Counter Underflow/Overflow (QPOSMAX = 4) ........................................................ 1660
15-138. Software Index Marker for 1000-line Encoder (QEPCTL[IEL] = 1)............................................. 1662
15-139. Strobe Event Latch (QEPCTL[SEL] = 1) .......................................................................... 1663
15-140. eQEP Position-compare Unit ....................................................................................... 1664
15-141. eQEP Position-compare Event Generation Points ............................................................... 1665
15-142. eQEP Position-compare Sync Output Pulse Stretcher.......................................................... 1665
15-143. eQEP Edge Capture Unit ........................................................................................... 1667
15-144. Unit Position Event for Low Speed Measurement (QCAPCTL[UPPS] = 0010).............................. 1667
15-145. eQEP Edge Capture Unit - Timing Details........................................................................ 1668
15-146. eQEP Watchdog Timer.............................................................................................. 1669
15-147. eQEP Unit Time Base ............................................................................................... 1670
15-148. EQEP Interrupt Generation ......................................................................................... 1670
15-149. eQEP Position Counter Register (QPOSCNT).................................................................... 1673
15-150. eQEP Position Counter Initialization Register (QPOSINIT) ..................................................... 1673
15-151. eQEP Maximum Position Count Register (QPOSMAX) ......................................................... 1673
15-152. eQEP Position-Compare Register (QPOSCMP).................................................................. 1674
15-153. eQEP Index Position Latch Register (QPOSILAT) ............................................................... 1674
15-154. eQEP Strobe Position Latch Register (QPOSSLAT)............................................................. 1674
15-155. eQEP Position Counter Latch Register (QPOSLAT) ............................................................. 1675
15-156. eQEP Unit Timer Register (QUTMR)............................................................................... 1675
15-157. eQEP Unit Period Register (QUPRD).............................................................................. 1675
15-158. eQEP Watchdog Timer Register (QWDTMR)..................................................................... 1676
15-159. eQEP Watchdog Period Register (QWDPRD) .................................................................... 1676
15-160. QEP Decoder Control Register (QDECCTL) ...................................................................... 1677
15-161. eQEP Control Register (QEPCTL) ................................................................................. 1678
15-162. eQEP Capture Control Register (QCAPCTL) ..................................................................... 1680
15-163. eQEP Position-Compare Control Register (QPOSCTL) ......................................................... 1681
15-164. eQEP Interrupt Enable Register (QEINT).......................................................................... 1682
15-165. eQEP Interrupt Flag Register (QFLG).............................................................................. 1683
15-166. eQEP Interrupt Clear Register (QCLR) ............................................................................ 1684
15-167. eQEP Interrupt Force Register (QFRC)............................................................................ 1686
15-168. eQEP Status Register (QEPSTS)................................................................................... 1687
15-169. eQEP Capture Timer Register (QCTMR).......................................................................... 1688
15-170. eQEP Capture Period Register (QCPRD) ......................................................................... 1688
15-171. eQEP Capture Timer Latch Register (QCTMRLAT).............................................................. 1688
15-172. eQEP Capture Period Latch Register (QCPRDLAT)............................................................. 1689
15-173. eQEP Revision ID Register (REVID) ............................................................................... 1689
39
SPRUH73H–October 2011–Revised April 2013 List of Figures
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