MC68HC11G5 Datasheet, PDF (143/195 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller

Freescale Semiconductor, Inc.
EVI2 (PH4)
E
E/2
E/4
E/8
E/16
E/32
E/64
E/128
INPUT2
CLEAR
EVCNT2
8
ECMP2A
8
ECMP2B
EVENT2
CLEAR
EVCNT1
8
ECMP1A
8
ECMP1B
EVENT1
R
(PH6) EVO
S
Figure 11-5. 8-bit PWM with 256 Clock Prescaler (Mode 3)
The PWM unit will also work as a pulse accumulator by switching off the output signal to the EVO
pin (PH6) and ignoring ECMP1B.
11.5.2 Operation of Pulse Accumulator Unit in Mode 3
The PA unit can be clocked by the E-clock, a scaled E-clock, or an external signal applied to the EVI2
(PH4) pin. Alternatively an external signal on EVI2 can be used to gate the E-clock or scaled E-clock
signal to the counter EVCNT2. The clock source is selected via the INPUT2 selector.
EVCNT2 counts the clock pulses coming from the INPUT2 selector. It is cleared by a successful
comparison between itself and the compare register ECMP2A. ECMP2A can be programmed with
EVENT COUNTER
11-13
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