Motorola DSP56301 - Manual (Page 273)

Operating Modes
Triple Timer Module 9 -11
Figure 9-8. Toggle Mode, TRM = 0
Mode 2 (internal clock): TRM = 0
N = write preload
M = write compare
TE
TLR
TCPR
TCF (Compare Interrupt if TCIE = 1)
first event
M
N
First toggle = M - N clock periods
Second and later toggles = 2
24
clock periods
TIO pin (INV = 0)
TIO pin (INV = 1)
1 Counter (TCR) 0 N N + 1 M 0 M + 1
TOF (Overflow Interrupt if TCIE = 1)
(CLK/2 or prescale CLK)
Clock