MC912DT128ACPV Freescale Semiconductor, MC912DT128ACPV Datasheet - Page 185

• 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

12.9 Computer Operating Properly (COP)
MC68HC912DT128A — Rev 4.0
MOTOROLA
PCLK
Figure 12-9. Clock Chain for MSCAN, SPI, ATD0, ATD1 and BDM
÷
÷
÷
÷
÷
÷
÷
÷
2
2
2
2
2
2
2
2
BITS: SPR2, SPR1, SPR0
REGISTER: SP0BR
0:1:0
1:1:0
0:0:1
0:1:1
1:0:0
1:0:1
1:1:1
0:0:0
The COP or watchdog timer is an added check that a program is running
and sequencing properly. When the COP is being used, software is
responsible for keeping a free running watchdog timer from timing out. If
the watchdog timer times out it is an indication that the software is no
longer being executed in the intended sequence; thus a system reset is
initiated. Three control bits allow selection of seven COP time-out
periods. When COP is enabled, sometime during the selected period the
program must write $55 and $AA (in this order) to the COPRST register.
If the program fails to do this the part will reset. If any value other than
$55 or $AA is written, the part is reset.
COUNTER (PR0-PR4)
5-BIT MODULUS
Freescale Semiconductor, Inc.
For More Information On This Product,
SYSCLK
Go to: www.freescale.com
EXTALi
ECLK
BCLK
BIT RATE
SPI
Clock Functions
SYNCHRONIZER
CLKSRC
CLKSW
÷
LOGIC
BKGD
PIN
2
BKGD DIRECTION
BKGD OUT
BKGD IN
and ATD1
TO ATD0
Computer Operating Properly (COP)
BDM BIT CLOCK:
Receive: Detect falling edge,
count 12 E clocks, Sample input
Transmit 1: Detect falling edge,
count 6 E clocks while output is
high impedance, Drive out 1 E
cycle pulse high, high imped-
ance output again
Transmit 0: Detect falling edge,
Drive out low, count 9 E clocks,
Drive out 1 E cycle pulse high,
high impedance output
MSCAN
CLOCK
Clock Functions
Technical Data
185