MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 251

• Manufacturer Part Number: MC908AP32CFBE
• Manufacturer: Freescale

Specifications of MC908AP32CFBE

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 2KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• 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: 44
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Lead Free Status / RoHS Status: Compliant

15.3.3 Conversion Time
Conversion starts after a write to the ADSCR. One conversion will take between 16 and 17 ADC clock
cycles, therefore:
Freescale Semiconductor
AIEN
INTERRUPT
INTERNAL
DATA BUS
LOGIC
Number of bus cycles = conversion time × bus frequency
COCO
Conversion time =
READ DDRAx
WRITE DDRAx
WRITE PTAx
READ PTAx
CONVERSION
COMPLETE
BUS CLOCK
CGMXCLK
RESET
MC68HC908AP Family Data Sheet, Rev. 4
Figure 15-2. ADC Block Diagram
ADC DATA REGISTERS
16 to17 ADC cycles
ADIV[2:0]
ADRH0
ADC frequency
GENERATOR
10-BIT ADC
DDRAx
PTAx
CLOCK
ADRL0
ADRL1
ADRL2
ADRL3
ADCICLK
ADICLK
VOLTAGE IN
DISABLE
(V
ADC
ADIN
)
2-BIT UP-COUNTER
DISABLE
CHANNEL
ADC0–ADC7
(8 CHANNELS)
SELECT
MUX
ADCH[4:0]
Functional Description
AUTO[1:0]
ASCAN
PTAx/ADCx
VREFH
VREFL
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