DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 206
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DSP56303
Manufacturer Part Number
DSP56303
Description
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.DSP56303.pdf
(292 pages)
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Triple Timer Module
9-14
Mode 5 (internal clock): TRM = 0
Mode 5 (internal clock): TRM = 1
TCF (Compare Interrupt if TCIE = 1)
N = write preload
M = write compare
TCF (Compare Interrupt if TCIE = 1)
N = write preload
M = write compare
TE
Clock
(CLK/2 or prescale CLK)
TLR
Counter
TCR
TIO pin
TE
Clock
(CLK/2 or prescale CLK)
TLR
NOTE: If INV = 1, a 1-to-0 edge on TIO loads the counter, and a 0-to-1 edge on TIO
loads TCR with count and the counter with N.
Counter
TCR
TIO pin
NOTE: If INV = 1, a 1-to-0 edge on TIO loads the counter, and a 0-to-1 edge on TIO
loads TCR with count and the counter with N.
Figure 9-13. Period Measurement Mode, TRM = 1
Figure 9-14. Period Measurement Mode, TRM = 0
N
N
0
0
period being measured
period being measured
first event
DSP56303 User’s Manual, Rev. 2
first event
N
N
N + 1
N + 1
M
M
M
M
M + 1
N
Interrupt Service
reads TCR; period
= M - N clock
periods
Counter continues
counting, does
not stop. Overflow
may occur (TOF=1).
Freescale Semiconductor
Interrupt Service
reads TCR; period
= M - N clock
periods
Counter continues
counting, does
not stop
N + 1
N + 1