MC68331CEH25 Freescale Semiconductor, MC68331CEH25 Datasheet - Page 74

• Manufacturer Part Number: MC68331CEH25
• Description: IC MCU 32BIT 25MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68331CEH25

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SCI, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Controller Family/series: 68K
• No. Of I/o's: 18
• Cpu Speed: 25MHz
• No. Of Timers: 1
• Embedded Interface Type: QSPI, SCI, UART
• No. Of Pwm Channels: 2
• Digital Ic Case Style: PQFP
• Rohs Compliant: Yes
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Data Ram Size: 80 B
• Interface Type: QSPI, SCI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

6.3 Pulse-Width Modulator
74
The pulse-width modulation submodule has two output pins. The outputs are periodic waveforms con-
trolled by a single frequency whose duty cycles can be independently selected and modified by user
software. Each PWM can be independently programmed to run in fast or slow mode. The PWM unit has
its own 16-bit free-running counter, which is clocked by an output of the nine-stage prescaler (the same
prescaler used by the capture/compare unit) or by the clock input pin, PCLK.
PRESCALER CLOCK
16-BIT COUNTER
FROM
PWMA
PIN
F1A
BIT
[14:0]
ZERO DETECTOR
LATCH
SFA
Freescale Semiconductor, Inc.
BIT
R
S
For More Information On This Product,
Figure 18 PWM Unit Block Diagram
PWMABUF REGISTER
Go to: www.freescale.com
"A" COMPARATOR
"A" MULTIPLEXER
PWMA REGISTER
16-BIT DATA BUS
PWMBBUF REGISTER
"B" COMPARATOR
PWMB REGISTER
"B" MULTIPLEXER
ZERO DETECTOR
LATCH
SFB
BIT
R
S
MC68331TS/D
16/32 PWM BLOCK BLOCK
PWMB
PIN
F1B
BIT