MC68HC908GP32 Datasheet, PDF (97/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC)
I/O Registers
5.8.2 ADC Data Register
One 8-bit result register, ADC data register (ADR), is provided. This
register is updated each time an ADC conversion completes.
Address: $003D
Bit 7
6
5
4
3
2
1
Bit 0
Read: AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 5-3. ADC Data Register (ADR)
5.8.3 ADC Clock Register
The ADC clock register (ADCLK) selects the clock frequency for the
ADC.
Address: $003E
Bit 7
6
5
4
3
2
1
Bit 0
Read:
0
0
0
0
ADIV2 ADIV1 ADIV0 ADICLK
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 5-4. ADC Clock Register (ADCLK)
ADIV2–ADIV0 — ADC Clock Prescaler Bits
ADIV2–ADIV0 form a 3-bit field which selects the divide ratio used by
the ADC to generate the internal ADC clock. Table 5-2 shows the
available clock configurations. The ADC clock should be set to
approximately 1 MHz.
MC68HC908GP32•MC68HC08GP32 — Rev. 6
MOTOROLA
Analog-to-Digital Converter (ADC)
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Go to: www.freescale.com
Technical Data
95