MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 348

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Timer Modules (TIM1 and TIM2)
16.8.4.2 Gated Time Accumulation Mode
Advance Information
348
NOTE:
NOTE:
NOTE:
The PA overflow flag, PAOVF, is set when the PA rolls over from $FFFF
to $0000. The PA overflow interrupt enable bit, PAOVI, enables the
PAOVF flag to generate interrupt requests.
The PA can operate in event counter mode even when the timer enable
bit, TIMEN, is clear.
Setting the PAMOD bit configures the PA for gated time accumulation
operation. An active level on the PAI pin enables a divide-by-64 clock to
drive the PA. The PA edge bit, PEDGE, selects low levels or high levels
to enable the divide-by-64 clock.
The trailing edge of the active level at the PAI pin sets the PA input flag,
PAIF. The PA input interrupt enable bit, PAI, enables the PAIF flag to
generate interrupt requests.
The PAI input and timer channel 3 use the same pin. To use the PAI
input, disconnect it from the output logic by clearing the channel 3 output
mode and output level bits, OM3 and OL3. Also clear the channel 3
output compare mask bit, OC3M3.
The PA counter registers, TIMPACNTH/L reflect the number of pulses
from the divide-by-64 clock since the last reset.
The timer prescaler generates the divide-by-64 clock. If the timer is not
active, there is no divide-by-64 clock.
Figure 16-26. Channel 3 Output Compare/Pulse Accumulator Logic
Freescale Semiconductor, Inc.
For More Information On This Product,
Timer Modules (TIM1 and TIM2)
Go to: www.freescale.com
CHANNEL 3 OUTPUT COMPARE
OM3
OL3
ACCUMULATOR
PULSE
OC3M3
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
PAD
MOTOROLA