MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 355

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

68HC908AZ32A — Rev 0.0
MOTOROLA
NOTE:
ADICLK — ADC Input Clock Register Bit
During the conversion process, changing the ADC clock will result in an
incorrect conversion.
Freescale Semiconductor, Inc.
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
For More Information On This Product,
1 = Internal bus clock
0 = External clock (CGMXCLK)
Analog-To-Digital Converter (ADC-15)
Go to: www.freescale.com
X = don’t care
ADIV2
1 MHz =
0
0
0
0
1
Table 21-2. ADC Clock Divide Ratio
on page 448.
ADIV1
X
0
0
1
1
f
XCLK
or Bus Frequency
ADIV0
ADIV[2:0]
X
0
1
0
1
Analog-To-Digital Converter (ADC-15)
ADC Input Clock / 16
ADC Input Clock / 2
ADC Input Clock / 4
ADC Input Clock / 8
ADC Input Clock /1
ADC Clock Rate
Advance Information
I/O Registers
ADC
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