XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 481

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

MC68HC908AZ60A — Rev 2.0
MOTOROLA
NOTE:
ADICLK — ADC Input Clock Register Bit
During the conversion process, changing the ADC clock will result in an
incorrect conversion.
ADICLK selects either bus clock or CGMXCLK as the input clock
source to generate the internal ADC clock. Reset selects CGMXCLK
as the ADC clock source.
If the external clock (CGMXCLK) is equal to or greater than 1 MHz,
CGMXCLK can be used as the clock source for the ADC. If
CGMXCLK is less than 1 MHz, use the PLL-generated bus clock as
the clock source. As long as the internal ADC clock is at
approximately 1 MHz, correct operation can be guaranteed. See
Characteristics
1 = Internal bus clock
0 = External clock (CGMXCLK)
Analog-to-Digital Converter (ADC)
X = don’t care
ADIV2
1 MHz = 
0
0
0
0
1
Table 26-2. ADC Clock Divide Ratio
on page 534.
ADIV1
X
0
0
1
1
f
XCLK
or Bus Frequency
ADIV0
ADIV[2:0]
X
0
1
0
1
ADC Input Clock / 16
ADC Input Clock / 2
ADC Input Clock / 4
ADC Input Clock / 8
ADC Input Clock /1
ADC Clock Rate
Analog-to-Digital Converter (ADC)
Technical Data
I/O Registers
ADC
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