MC68HC908MR16CFU Freescale Semiconductor, MC68HC908MR16CFU Datasheet - Page 47

• Manufacturer Part Number: MC68HC908MR16CFU
• Description: IC MCU 8MHZ 16K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR16CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 44
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

3.3.1 ADC Port I/O Pins
PTC1/ATD9:PTC0/ATD8 and PTB7/ATD7:PTB0/ATD0 are general-purpose I/O pins that are shared with
the ADC channels.
The channel select bits define which ADC channel/port pin will be used as the input signal. The ADC
overrides the port logic when that port is selected by the ADC multiplexer. The remaining ADC
channels/port pins are controlled by the port logic and can be used as general-purpose input/output (I/O)
pins. Writes to the port register or DDR will not have any effect on the port pin that is selected by the ADC.
Read of a port pin which is in use by the ADC will return a 0.
3.3.2 Voltage Conversion
When the input voltage to the ADC equals V
input voltage equals V
straight-line linear conversions. All other input voltages will result in $3FF if greater than V
if less than V
Freescale Semiconductor
INTERNAL
DATA BUS
REFL
AIEN
Input voltage should not exceed the analog supply voltages. See
19.13 Analog-to-Digital Converter (ADC)
INTERRUPT
LOGIC
.
READ PTB/PTC
COCO
REFL
BUS CLOCK
CONVERSION
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
CGMXCLK
COMPLETE
, the ADC converts it to $000. Input voltages between V
Figure 3-2. ADC Block Diagram
ADIV[2:0]
ADC DATA REGISTERS
GENERATOR
REFH
CLOCK
ADC
ADC CLOCK
, the ADC converts the signal to $3FF (full scale). If the
NOTE
ADICLK
Characteristics.
ADC VOLTAGE IN
ADVIN
DISABLE
CHANNEL
SELECT
ADC CHANNEL x
REFH
PTB/Cx
Functional Description
and V
REFH
ADCH[4:0]
REFL
and $000
are
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