DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 210

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Triple Timer Module
9.3.4 Watchdog Modes
The following watchdog timer modes are provided:
9-18
Mode 7 (internal clock): TRM = 0
NOTE: On overflow, TCR is loaded with the value of TLR.
N = write preload
M = write compare
Watchdog Pulse
Watchdog Toggle
TE
Clock
(CLK/2 or prescale CLK)
TLR
TCPR
TCF (Compare Interrupt if TCIE = 1)
Counter (TCR)
TIO pin (INV = 0)
TIO pin (INV = 1)
TCF (Overflow Interrupt if TDIE = 1)
Figure 9-17. Pulse Width Modulation Toggle Mode, TRM = 0
N
M
0
Pulse width
DSP56303 User’s Manual, Rev. 2
first event
N
Period
M
Period = $FFFFFF - TLR + 1
Duty cycle = ($FFFFFF - TCPR)
Ensure that TCPR > TLR for correct functionality
M + 1
0
Freescale Semiconductor
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2