MC9S08JM16 Datasheet, PDF (144/386 Pages) Freescale Semiconductor, Inc – Microcontrollers

Analog-to-Digital Converter (S08ADC12V1)
ADIV
00
01
10
11
Table 10-7. Clock Divide Select
Divide Ratio
1
2
4
8
Clock Rate
Input clock
Input clock ÷ 2
Input clock ÷ 4
Input clock ÷ 8
MODE
00
01
10
11
Table 10-8. Conversion Modes
Mode Description
8-bit conversion (N=8)
12-bit conversion (N=12)
10-bit conversion (N=10)
Reserved
ADICLK
00
01
10
11
Table 10-9. Input Clock Select
Selected Clock Source
Bus clock
Bus clock divided by 2
Alternate clock (ALTCLK)
Asynchronous clock (ADACK)
10.3.8 Pin Control 1 Register (APCTL1)
The pin control registers disable the I/O port control of MCU pins used as analog inputs. APCTL1 is used
to control the pins associated with channels 0–7 of the ADC module.
7
R
ADPC7
W
Reset:
0
6
ADPC6
5
ADPC5
4
ADPC4
3
ADPC3
2
ADPC2
0
0
0
0
0
Figure 10-10. Pin Control 1 Register (APCTL1)
1
ADPC1
0
0
ADPC0
0
Table 10-10. APCTL1 Register Field Descriptions
Field
7
ADPC7
6
ADPC6
Description
ADC Pin Control 7. ADPC7 controls the pin associated with channel AD7.
0 AD7 pin I/O control enabled
1 AD7 pin I/O control disabled
ADC Pin Control 6. ADPC6 controls the pin associated with channel AD6.
0 AD6 pin I/O control enabled
1 AD6 pin I/O control disabled
MC9S08JM16 Series Data Sheet, Rev. 2
144
Freescale Semiconductor