MC68F375BGMZP33 Freescale Semiconductor, MC68F375BGMZP33 Datasheet - Page 487

• Manufacturer Part Number: MC68F375BGMZP33
• Description: IC MPU 32BIT 33MHZ 217-PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68F375BGMZP33

• Processor Type: M683xx 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 217-PBGA
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Program Memory Type: Flash
• Program Memory Size: 256 KB
• Data Ram Size: 10 KB
• Interface Type: SPI, SCI, CAN
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 16
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: No

13.11.7 CTM9 Input Pulse Accumulation
MC68F375
REFERENCE MANUAL
Prescaler
Modulus
Select
Control
value. The leading edge compare value is written into register A by software, and the
trailing edge time is written into register B1. When the leading edge value is reached,
the content of register B1 is transferred to register B2, to form the next trailing edge
value. Subsequent changes to the output pulse width are made by writing a new time
into register B1. Updates to the pulse width are always synchronized to the leading
edge of the waveform.
It is typical to use the pulse width modulation mode of the DASM without interrupts,
though an interrupt can be enabled to occur on the leading edge. When the output is
an unchanging repetitive waveform, the DASM continuously generates the signal with-
out any software intervention. When the software needs to change the pulse width, a
new trailing edge time is written to the DASM. The output is changed on the next full
pulse. When the software needs to change the output at a regular rate, such as an
acceleration curve, the leading edge interrupt gives the software one period time to
update the new trailing edge time.
Counting the number of pulses on an input signal is another capability of the CTM9.
Pulse accumulation uses either an FCSM or an MCSM. Since the counters in the
Clock
or Pin
From
Modulus Counter Submodule
Figure 13-20 CTM9 Example — Pulse Width Modulation Output
Free Running or
Load
Modulus Register
16-Bit Up Counter
Freescale Semiconductor, Inc.
For More Information On This Product,
CONFIGURABLE TIMER MODULE (CTM9)
Select
Bus
Go to: www.freescale.com
Submodule Bus
Rev. 25 June 03
Buses
16-Bit
Time-
Base
Two
Select
Bus
16-Bit Register A
16-Bit Register B2
16-Bit Register B1
16-Bit Compare A
16-Bit Compare B
Double Action Submodule
Compare
Interrupt
Leading
Flip-Flop
Output
Output
Edge
MOTOROLA
on
Output
Pin
13-61