TPU3 ROM Functions
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
D-35
D.12
Fast Quadrature Decode TPU3 Function (FQD)
FQD is a position-feedback function for motor control. It provides the RCPU with a 16-bit free-running
position counter by decoding the two signals from a slotted encoder. FQD incorporates a “speed switch”
that disables one of the channels at high speed, allowing faster signals to be decoded. Furthermore, every
counter update provides a time stamp that is useful for interpolating position and determining velocity at
low speed or in instances that implement low-resolution encoders. The ITC function handles the third
index channel provided by some encoders. See Freescale TPU Progamming Note
Fast Quadrature Decode
TPU Function (FQD), (TPUPN02/D).
and
show the host interface areas for the FQD function for primary and
secondary channels.
See
for the
PRAM Address Offset Map.
CONTROL BITS
Figure D-21. MULTI Parameters — PWM_IN
Summary of Contents for MPC561
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Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
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Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...
