DSP56309EVM Freescale Semiconductor, DSP56309EVM Datasheet - Page 203

• Manufacturer Part Number: DSP56309EVM
• Description: KIT EVALUATION FOR XC56309
• Manufacturer: Freescale Semiconductor
• Type: DSPr

Specifications of DSP56309EVM

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Description/function: Audio DSPs
• Product: Audio Modules
• For Use With/related Products: DSP56309
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.3.2 Signal Measurement Modes
The following signal measurement and pulse width modulation modes are provided:
The external signal synchronizes with the internal clock that increments the counter. This
synchronization process can cause the number of clocks measured for the selected signal value to
vary from the actual signal value by plus or minus one counter clock cycle.
Freescale Semiconductor
NOTE: If INV = 1, counter is clocked on 1-to-0 clock transitions, instead of 0-to-1 transitions.
Mode 3 (internal clock): TRM = 0
N = write preload
M = write compare
Measurement input width (Mode 4)
Measurement input period (Mode 5)
Measurement capture (Mode 6)
Pulse width modulation (PWM) mode (Mode 7)
TE
Clock
(TIO pin or prescale CLK)
TLR
Counter (TCR)
TCPR
TCF (Compare Interrupt if TCIE = 1)
TOF (Overflow Interrupt if TCIE = 1)
Figure 9-10. Event Counter Mode, TRM = 0
N
M
0
DSP56309 User’s Manual, Rev. 1
first event
N
N + 1
M
if clock source is from TIO pin,
TIO < CPUCLK + 4
M + 1
0
1
Operating Modes
9-11