MC68HC908BD48IFB Freescale Semiconductor, MC68HC908BD48IFB Datasheet - Page 161

• Manufacturer Part Number: MC68HC908BD48IFB
• Description: IC MCU 48K FLASH 6MHZ USB 44PQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908BD48IFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: I²C, USB
• Peripherals: POR, PWM
• Number Of I /o: 32
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

12.8.3 ADC Input Clock Register
MC68HC908BD48
Freescale Semiconductor
—
Rev. 2.1
Address:
This register selects the clock frequency for the ADC.
ADIV2:ADIV0 — ADC Clock Prescaler Bits
Reset:
X = don’t care
Read:
Write:
ADIV2, ADIV1, and ADIV0 form a 3-bit field which selects the divide
ratio used by the ADC to generate the internal ADC clock.
shows the available clock configurations. The ADC clock should be
set to approximately 1MHz. With an internal bus frequency of 6MHz,
set ADIV[2:0] = 010, for a divide by four ADC clock rate.
ADIV2
0
0
0
0
1
ADIV2
$005F
Bit 7
Figure 12-4. ADC Input Clock Register (ADICLK)
Analog-to-Digital Converter (ADC)
0
= Unimplemented
ADIV1
ADIV1
Table 12-3. ADC Clock Divide Ratio
X
0
0
1
1
6
0
ADIV0
5
0
ADIV0
X
0
1
0
1
4
0
0
3
0
0
Analog-to-Digital Converter (ADC)
Internal bus clock ÷ 1
Internal bus clock ÷ 2
Internal bus clock ÷ 4
Internal bus clock ÷ 8
Internal bus clock ÷ 16
ADC Clock Rate
2
0
0
1
0
0
Table 12-3
Data Sheet
Bit 0
0
0
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