MC68HC711G5 MOTOROLA [Motorola, Inc], MC68HC711G5 Datasheet - Page 139

• Manufacturer Part Number: MC68HC711G5
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC11G5
11.3.3.9
This unit controls the output signal from the PWM unit. If the EVOEN bit in the EVCTL register is set
to one, the EVO unit is enabled. The state of the EVPOL bit in the EVCTL register then determines
the polarity of the event output. If EVO is not required for pulse width modulation, the EVOEN bit
should be reset to zero to disable the EVO unit and to allow pin PH6 to be used for general purpose
I/O.
In mode 2, the event counter operates as an 8-bit PWM unit and an 8-bit counter (the PA unit)
which increments at the end of each period of the PWM unit. If mode 2 is selected (EVMDB = 1,
EVMDA = 0), then the elements of the event counter are configured as shown in Figure 11-4.
11.4
E/128
E/16
E/32
E/64
EVI1(PH5)
MODE 2: 8-BIT PWM WITH PERIOD COUNTER
E/2
E/4
E/8
E
Output Unit (EVO)
Figure 11-4. 8-bit PWM with Period Counter (Mode 2)
INPUT1
EVENT COUNTER
8
ECMP2A
ECMP2B
ECMP1A
ECMP1B
EVCNT2
EVCNT1
8
CLEAR
CLEAR
8
8
S
R
EVENT2
EVENT1
(PH6) EVO
MOTOROLA
11-9