MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 248

• Manufacturer Part Number: MC912DG128ACPV
• Description: IC MCU 128K FLASH 8MHZ 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912DG128ACPV

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x8/10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Enhanced Capture Timer
15.3.1 IC Channels
15.3.1.1 Non-Buffered IC Channels
Technical Data
248
Four IC channels are the same as on the standard timer with one capture
register which memorizes the timer value captured by an action on the
associated input pin.
Four other IC channels, in addition to the capture register, have also one
buffer called holding register. This permits to memorize two different
timer values without generation of any interrupt.
Four 8-bit pulse accumulators are associated with the four buffered IC
channels. Each pulse accumulator has a holding register to memorize
their value by an action on its external input. Each pair of pulse
accumulators can be used as a 16-bit pulse accumulator.
The 16-bit modulus down-counter can control the transfer of the IC
registers contents and the pulse accumulators to the respective holding
registers for a given period, every time the count reaches zero.
The modulus down-counter can also be used as a stand-alone time base
with periodic interrupt capability.
The IC channels are composed of four standard IC registers and four
buffered IC channels.
The main timer value is memorized in the IC register by a valid input pin
transition. If the corresponding NOVWx bit of the ICOVW register is
cleared, with a new occurrence of a capture, the contents of IC register
are overwritten by the new value.
Freescale Semiconductor, Inc.
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An IC register is empty when it has been read or latched into the
holding register.
A holding register is empty when it has been read.
If the corresponding NOVWx bit of the ICOVW register is set, the
capture register cannot be written unless it is empty.
This will prevent the captured value to be overwritten until it is read.
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Enhanced Capture Timer
MC68HC912DT128A — Rev 4.0
MOTOROLA