AN2525 Freescale Semiconductor / Motorola, AN2525 Datasheet - Page 2

• Manufacturer Part Number: AN2525
• Description: DC Motor - XOR version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

AN2525/D
2
The function set consists of 5 TPU functions:
The DCm TPU function set drives a DC Motor, independently of the CPU. The
CPU is required only to set a duty-cycle (dc) parameter in the range (–1,1). This
determines both the speed and the direction. The function generates unipolar-
switched center-aligned PWM signals.
The DCmXor_C and DCmXor_T TPU functions work together to generate 4
pairs of XOR gate inputs. The XOR gate outputs then produce a 4-channel 2-
phase center-aligned PWM signal with dead-time between the top and bottom
channels. The Synchronization Signal for the DCmXor function can be used to
generate one or more adjustable signals for a wide range of uses. These are
synchronized to the PWM, and track changes in the PWM period. The Resolver
Reference Signal for the DCmXor function can be used to generate one or
more 50% duty-cycle adjustable signals that are also synchronized to the
PWM.The Fault Input for the DCmXor function is a TPU input function that sets
all PWM outputs low when the input signal goes low.
DC Motor – XOR version TPU Function Set (DCmXor)
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Freescale Semiconductor, Inc.
For More Information On This Product,
DC Motor – XOR version – C channels (DCmXor_C)
DC Motor – XOR version – T channels (DCmXor_T)
Synchronization Signal for DC Motor – XOR version (DCmXor_sync)
Resolver Reference Signal for DC Motor – XOR version (DCmXor_res)
Fault Input for DC Motor – XOR version (DCmXor_fault)
Go to: www.freescale.com
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