MC68HC908GP32CP Freescale Semiconductor, MC68HC908GP32CP Datasheet - Page 92

• Manufacturer Part Number: MC68HC908GP32CP
• Description: IC MCU 8MHZ 32K FLASH 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CP

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• For Use With: M68EVB908GP32 - BOARD EVALUATION FOR HC908GP32
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Analog-to-Digital Converter (ADC)
5.4.2 Voltage Conversion
5.4.3 Conversion Time
5.4.4 Conversion
Technical Data
90
NOTE:
When the input voltage to the ADC equals V
signal to $FF (full scale). If the input voltage equals V
converts it to $00. Input voltages between V
straight-line linear conversion.
Inside the ADC module, the reference voltages V
the ADC analog power, V
analog ground, V
exceed these analog supply voltages.
Connect the V
connect the V
The V
Conversion starts after a write to the ADSCR. One conversion will take
between 16 and 17 ADC clock cycles. The ADIVx and ADICLK bits
should be set to provide a 1-MHz ADC clock frequency.
In continuous conversion mode, the ADC data register will be filled with
new data after each conversion. Data from the previous conversion will
be overwritten whether that data has been read or not. Conversions will
continue until the ADCO bit is cleared. The COCO bit is set after the first
conversion and will stay set until the next write of the ADC status and
control register or the next read of the ADC data register.
In single conversion mode, conversion begins with a write to the
ADSCR. Only one conversion occurs between writes to the ADSCR.
Number of bus cycles = conversion time × bus frequency
DDAD
Analog-to-Digital Converter (ADC)
pin should be routed carefully for maximum noise immunity.
Conversion time =
SSAD
DDAD
SSAD
pin to the same voltage potential as the V
pin to the same voltage potential as the V
. Therefore, the ADC input voltage should not
DDAD
; and V
16 to 17 ADC cycles
MC68HC908GP32
ADC frequency
REFL
is connected to the ADC
REFH
REFH
•
, the ADC converts the
MC68HC08GP32
REFH
and V
REFL ,
is connected to
REFL
the ADC
DD
MOTOROLA
are a
SS
pin, and
pin.
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Rev. 6