MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 238

• Manufacturer Part Number: MC68HC908AB32
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Analog-to-Digital Converter (ADC)
Technical Data
238
ADICLK — ADC Input Clock Select Bit
ADICLK selects either the 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.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = Internal bus clock
0 = External clock (CGMXCLK)
X = don’t care
ADIV2
Analog-to-Digital Converter (ADC)
0
0
0
0
1
Go to: www.freescale.com
ADC input clock frequency
-----------------------------------------------------------------------
Table 14-2. ADC Clock Divide Ratio
ADIV1
X
0
0
1
1
ADIV[2:0]
ADIV0
X
0
1
0
1
ADC input clock
ADC input clock
ADC input clock
ADC input clock
ADC input clock
=
ADC Clock Rate
1MHz
MC68HC908AB32
1
2
4
8
16
MOTOROLA
—
Rev. 1.0