Page 695 - Engineering Digital Design
P. 695

NJ
 \BC
 0
 0
  \BC
 0
 0
  AX 0°
 0
 *
                                                        AX
                                                          \BC
 FIGURE 13.43
 AX oo 01 _
 0
  01
                                                  0
 u
                                                        00
                                         [MXDLY
 0
  11
 0
 11 _
 1 )
 MNDLY-HOLD
                                         1
                                                        01
  10
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 /
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 ^
 10
                                                  1
                                         1
                                                        11
                             AX
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 LDZERO
                                            LJ — i
                                              ri r
 /DECDLY
 A
                             0°
                        GO
 AX
                MXDLY
 \BC
  \BC
                                          1
                                                 *
                                                        10
  \ 0°
 0
                                   DA
                               01
 oo
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                    ^~~
                CNT+GO
 MXDLY-HOLD
                                                        AX
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                               11
                0
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 0
 ^
                    1 — D
 ° 1
                                         0
                                                        °0
  10
                                                  GO
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 11
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                               10
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                CNT-HALT
                                             *
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                       * I
                           A  I
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                                         CNT.GO
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                                          1
                                                  1
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                                                #
                                                        10
                                         CNT+HALT
  11
 01
  10
 11
 10
 NS and output K-maps plotted from the state diagram in Fig. 13.42 showing minimum cover for a glitch-free design of the stepping motor controller.
 STDLY
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