User's Guide

200 201 202 0 1 2
Prescalecounter
(CNTHI)
T
(CNTLO)
imercounter
3 4
32-bitprescalersettings:count=CNTHI=200;period=PRDHI=202
32-bittimersettings:count=CNTLO=3;period=PRDLO=4
Prescalecounterreset
Timercounterincremented
Internal
clock
Inputclock
TSTATbitinTCR
CP_LO
PWID_LO
(CP_LO=0)
32-bittimerwith4-bitprescaler
(TIMHI)
32-bittimer
(TIMLO)
Timerinterrupt
(TINTHI)toCPU
Timerevent(TEVTHI)
toEDMA controller
Internal
clock
Externalclock
viaTINPL
Inputclock
CP_HI
PWID_HI(CP_HI=0)
Pulsegenerator
CLKSRC
Gatedinternalclock
Timerinterrupt(TINTLO)toCPU
Timerevent(TEVTLO)toEDMA controller
INVOUTP_LO
TSTATbitinTCR
OutputviaTOUTL
CNTLO
32-bittimercounter Timerperiod
Equalitycomparator
PRDLO
Pulsegenerator
CNTHI
32-bittimercounter Timerperiod
Equalitycomparator
PRDHI
TDDRHI
4-bitprescalecounter Prescaleperiod
Equalitycomparator
PSCHI
Timer Modes www.ti.com
Figure 5. Dual 32-Bit Timers Chained Mode Example
2.2.2 Unchained Mode
In the unchained mode, shown in Figure 6, the timer can operate as two independent 32-bit timers. One
32-bit timer (TIMHI) can be configured as a 32-bit timer being clocked by a 4-bit prescaler. The other
(TIMLO) can be used as a 32-bit timer.
Figure 6. Dual 32-Bit Timers Unchained Mode Block Diagram
10
C6472/TCI648x 64-Bit Timer SPRU818B–December 2005–Revised September 2010
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