Pulse Width Modulation Toggle Mode, Trm = 1 - Motorola DSP56303 User Manual

Operating Modes
Mode 7 (internal clock): TRM = 1
N = write preload
M = write compare
TE
Clock
(CLK/2 or prescale CLK)
TLR
Counter (TCR)
TCPR
TCF (Compare Interrupt if TCIE = 1)
TCF (Overflow Interrupt if TDIE = 1)
TIO pin (INV = 0)
TIO pin (INV = 1)
Figure 9-16. Pulse Width Modulation Toggle Mode, TRM = 1
9-20
first event
N
0
N
M
Pulse width
Period
DSP56303 User's Manual
Period = $FFFFFF - TLR + 1
Duty cycle = ($FFFFFF - TCPR)
Ensure that TCPR > TLR for correct functionality
M M + 1 0
N + 1
N