MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 408

• 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

INSTRUCTION— BDM Instruction Register (hardware command explanation)
Development Support
20.4.5.2 INSTRUCTION - Hardware Instruction Decode
Technical Data
408
RESET:
BIT 7
H/F
0
DATA
6
0
The INSTRUCTION register is written by the BDM hardware as a result
of serial data shifted in on the BKGD pin. It is readable and writable in
Special Peripheral mode on the parallel bus. It is discussed here for two
conditions: when a hardware command is executed and when a
firmware command is executed.
Read and write: all modes
. The hardware clears the INSTRUCTION register if 512 BDMCLK
cycles occur between falling edges from the host.
The bits in the BDM instruction register have the following meanings
when a hardware command is executed.
H/F — Hardware/Firmware Flag
The WRITE_BD_BYTE@FF01 command that changes CLKSW
including 150 cycles after the data portion of the command should be
timed at the old speed. Beginning with the start of the next BDM
command, the new clock can be used for timing BDM
communications.
If ECLK rate is slower than BDMCLK rate, CLKSW is ignored and
BDM system is forced to operate with ECLK.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = BDM system operates with ECLK.
0 = Firmware command
1 = Hardware command
R/W
5
0
Go to: www.freescale.com
Development Support
BKGND
4
0
W/B
3
0
BD/U
2
0
MC68HC912DT128A — Rev 4.0
1
0
0
BIT 0
0
0
MOTOROLA
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