MCHC912B32CFUE8 Freescale Semiconductor, MCHC912B32CFUE8 Datasheet - Page 138

• Manufacturer Part Number: MCHC912B32CFUE8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MCHC912B32CFUE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Cpu Family: HC12
• Device Core Size: 16b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 1KB
• # I/os (max): 63
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Package: 80PQFP
• Family Name: HC12
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 63
• Processor Series: HC912B
• Core: HC12
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 8 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: M68EVB912B32E
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pulse-Width Modulator (PWM)
11.2.15 Port P Data Direction Register
Read: Anytime
Write: Anytime
DDRP determines pin direction of port P when used for general-purpose I/O. When cleared, I/O pin is
configured for input. When set, I/O pin is configured for output.
11.3 PWM Boundary Cases
The boundary conditions for the PWM channel duty registers and the PWM channel period registers
cause the results shown in
11.4 Using the Output Compare 7 Feature to Generate a PWM
This timer exercise is intended to utilize the output compare function along with the output compare 7 new
feature to generate a PWM waveform. It must allow for the duty used to drive a DC motor on the UDLP1
board. The registers must be initialized accordingly TC7 = period and TC5 = high time (duty cycle). See
Figure
138
11-28.
Address: $0057
To verify program is working the DC motor must turn, the frequency, high
time, and duty cycle must displayed on the LCD.
Reset:
Read:
Write:
DDP7
Bit 7
Figure 11-27. Port P Data Direction Register (DDRP)
0
≥PWPERx
≥PWPERx
PWDTYx
Table
$FF
$FF
—
—
Table 11-2. PWM Boundary Conditions
DDP6
11-2.
6
0
Figure 11-28. Example Waveform
M68HC12B Family Data Sheet, Rev. 9.1
PERIOD
DDP5
PWPERx
5
0
>$00
>$00
$00
$00
HIGH TIME
—
—
NOTE
DDP4
4
0
HIGH TIME = DUTY CYCLE
PPOLx
DDP3
1
0
1
0
1
0
3
0
DDP2
2
0
Output
High
High
High
Low
Low
Low
DDP1
1
0
Freescale Semiconductor
DDP0
Bit 0
0