MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 308

• 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

Inter IC Bus
17.5.8 Handshaking
17.5.9 Clock Stretching
Technical Data
308
SCL1
SCL2
SCL
The clock synchronization mechanism can be used as a handshake in
data transfer. Slave devices may hold the SCL low after completion of
one byte transfer (9 bits). In such case, it halts the bus clock and forces
the master clock into wait states until the slave releases the SCL line.
The clock synchronization mechanism can be used by slaves to slow
down the bit rate of a transfer. After the master has driven SCL low the
slave can drive SCL low for the required period and then release it. If the
slave SCL low period is greater than the master SCL low period then the
resulting SCL bus signal low period is stretched.
Freescale Semiconductor, Inc.
For More Information On This Product,
Internal Counter Reset
Go to: www.freescale.com
Figure 17-3. IIC Clock Synchronization
Inter IC Bus
WAIT
MC68HC912DT128A — Rev 4.0
Start Counting High Period
MOTOROLA