mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 364

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC)
Technical Data
364
ADICLK — ADC Input Clock Select
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 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 1 MHz,
correct operation can be guaranteed. (See
Converter (ADC)
1 = Internal bus clock
0 = External clock (CGMXCLK)
Analog-to-Digital Converter (ADC)
X = don’t care
ADIV2
0
0
0
0
1
Table 19-2. ADC Clock Divide Ratio
1 MHz =
Characteristics.)
ADIV1
X
0
0
1
1
CGMXCLK or Bus Frequency
ADIV0
0
1
0
1
X
ADIV[2:0]
ADC input clock /1
ADC input clock /2
ADC input clock /4
ADC input clock /8
ADC input clock /16
ADC Clock Rate
21.11 Analog-to-Digital
MC68HC708MP16
Freescale Semiconductor
—
Rev. 3.1