MC68331CEH25 Freescale Semiconductor, MC68331CEH25 Datasheet - Page 159

• 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

7.1 General
MC68331
USER’S MANUAL
This section is an overview of GPT function. Refer to the GPT Reference Manual (GP-
TRM/AD) for complete information about the GPT module.
The 11-channel general-purpose timer (GPT) is used in systems where a moderate
level of CPU control is required. The GPT consists of a capture/compare unit, a pulse
accumulator, and two pulse-width modulators. A bus interface unit connects the GPT
to the intermodule bus (IMB).
The capture/compare unit features three input capture channels, four output compare
channels, and one channel that can be selected as an input capture or output compare
channel. These channels share a 16-bit free-running counter which derives its clock
from a nine-stage prescaler or from the external clock input signal, PCLK.
Pulse accumulator channel logic includes an 8-bit counter; the pulse accumulator can
operate in either event counting mode or gated time accumulation mode.
Pulse-width modulator outputs are periodic waveforms whose duty cycles can be in-
dependently selected and modified by user software. The PWM circuits share a 16-bit
free-running counter that can be clocked by the same nine-stage prescaler used by
the capture/compare unit or by the PCLK input.
All GPT pins can also be used for general-purpose input/output. The input capture and
output compare pins form a bidirectional 8-bit parallel port (PORTGP). PWM pins are
outputs only. PAI and PCLK pins are inputs only.
SECTION 7GENERAL-PURPOSE TIMER
Freescale Semiconductor, Inc.
For More Information On This Product,
GENERAL-PURPOSE TIMER
Go to: www.freescale.com
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