S9S08AW16A FREESCALE [Freescale Semiconductor, Inc], S9S08AW16A Datasheet - Page 243

• Manufacturer Part Number: S9S08AW16A
• Description: HCS08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 14
Analog-to-Digital Converter (S08ADC10V1)
14.1
The 10-bit analog-to-digital converter (ADC) is a successive approximation ADC designed for operation
within an integrated microcontroller system-on-chip. The ADC module design supports up to 28 separate
analog inputs (AD0-AD27). Only 9 (AD0-AD3, AD8-AD11, and AD27) of the possible inputs are
implemented on the MC9S08AC16 Series Family of MCUs. These inputs are selected by the ADCH bits.
Some inputs are shared with I/O pins as shown in
for the MC9S08AC16 Series devices are summarized in
14.2
The ADC channel assignments for the MC9S08AC16 Series devices are shown in the table below.
Channels that are unimplemented are internally connected to V
unknown value. Channels which are connected to an I/O pin have an associated pin control bit as shown.
Freescale Semiconductor
ADCH
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
Overview
Channel Assignments
Channel
AD10
AD11
AD12
AD13
AD14
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
Ignore any references to stop1 low-power mode in this chapter, because the
MC9S08AC16 Series does not support it.
PTD2/AD1P10
PTD3/AD1P11
PTB0/AD1P0
PTB1/AD1P1
PTB2/AD1P2
PTB3/AD1P3
PTD0/AD1P8
PTD1/AD1P9
V
V
V
V
V
V
V
Input
REFL
REFL
REFL
REFL
REFL
REFL
REFL
Table 14-1. ADC Channel Assignment
MC9S08AC16 Series Data Sheet, Rev. 8
Pin Control
ADPC10
ADPC11
ADPC0
ADPC1
ADPC2
ADPC3
ADPC8
ADPC9
N/A
N/A
N/A
N/A
N/A
N/A
N/A
NOTE
Figure
ADCH
14-1. All of the channel assignments of the ADC
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
Table
14-1.
REFL .
Channel
V
V
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AD27
REFH
REFL
Reserved channels convert to an
Internal Bandgap
Temp Sensor
Reserved
Reserved
Reserved
Reserved
Reserved
V
V
V
V
V
V
V
V
Input
REFH
REFL
REFL
REFL
REFL
REFL
REFL
REFL
Pin Control
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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