MC912DT128ACPV Freescale Semiconductor, MC912DT128ACPV Datasheet - Page 400

• Manufacturer Part Number: MC912DT128ACPV
• Description: IC 8MHZ 16 BIT MICROCONTROLLER
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912DT128ACPV

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 67
• 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
• Other names: KMC912DT128ACPV; Q1195202

Development Support
Technical Data
400
SPEEDUP PULSE
BKGD PIN
START OF BIT TIME
BKGD PIN
DRIVE TO
(TARGET
BDMCLK
TARGET MCU
HOST
DRIVE AND
MCU)
PERCEIVED
Figure 20-3. BDM Target to Host Serial Bit Timing (Logic 0)
Figure 20-2
MC68HC912DT128A MCU. Since the host is asynchronous to the target
MCU, there is a 0-to-1 cycle delay from the host-generated falling edge
on BKGD to the perceived start of the bit time in the target MCU. The
host holds the BKGD pin low long enough for the target to recognize it
(at least two target B cycles). The host must release the low drive before
the target MCU drives a brief active-high speed-up pulse seven cycles
after the perceived start of the bit time. The host should sample the bit
level about ten cycles after it started the bit time.
Freescale Semiconductor, Inc.
For More Information On This Product,
10 CYCLES
shows the host receiving a logic one from the target
Go to: www.freescale.com
Development Support
10 CYCLES
HIGH-IMPEDANCE
HOST SAMPLES
BKGD PIN
SPEEDUP PULSE
MC68HC912DT128A — Rev 4.0
HC12A4 BDM TARGET TO HOST TIM 0
EARLIEST
START OF
NEXT BIT
MOTOROLA