MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 229

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

10.9.1 Output Flip-Flop and Pin
10.9.2 Clock Selection
MC68336/376
USER’S MANUAL
The output flip-flop is the basic output mechanism of the PWMSM. Except when the
required duty cycle is 0% or 100%, the output flip-flop is set at the beginning of each
period and is cleared at the end of the designated pulse width. The polarity of the out-
put pulse is user programmable. The output flip-flop is connected to a buffer that drives
the PWMSM’s associated output pin. The PWMSM is disabled by clearing the EN bit
in the PWMSM status/interrupt/control register (PWMSIC). When the PWMSM is not
in use, the output pin can be used as a digital output controlled by the POL bit in
PWMSIC.
The PWMSM contains an 8-bit prescaler that is clocked by the PCLK1 signal (f
or f
prescaler outputs drives the PWMSM counter. Refer to Table 10-4 for the prescaler
output.
CLK2
sys
PCLK1
CLK1 CLK0
Figure 10-6 Pulse-Width Modulation Submodule Block Diagram
3) from the CPSM. The CLK[2:0] field in PWMSIC selects which of the eight
NEXT PERIOD REGISTER
16-BIT COMPARATOR
16-BIT UP COUNTER
PWMA
PERIOD REGISTER
256 PRESCALER
(N
SELECT
PWMA2
PWMA1
CLOCK
PWMC
COUNT
)
CONFIGURABLE TIMER MODULE 4
MATCH
ENABLE
FLAG
CONTROL REGISTER BITS
SEQUENCER
INTERRUPT
CONTROL
SUBMODULE BUS
STATE
LOAD
IL2
IL1
IL1
LOAD
IL0
SET
PULSE WIDTH REGISTER
CLEAR
16-BIT COMPARATOR
PWMB
NEXT PULSE WIDTH
REGISTER PWMB1
IARB3
FLIP-FLOP
OUTPUT
PWMB2
EN
CLEAR
MATCH
OUTPUT
BUFFER
POL
DETECT
ZERO
ALL ZEROS
PIN
OUTPUT
PIN
CTM PWM BLOCK
MOTOROLA
sys
10-13
2