MC9S08AW16CFUE Datasheet, PDF (233/324 Pages) Freescale Semiconductor, Inc – MC9S08AW60 Features

Chapter 14
Analog-to-Digital Converter (S08ADC10V1)
14.1 Overview
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 18 (AD0-AD15, AD26, and AD27) of the possible inputs are
implemented on the MC9S08AW60 Series of MCUs. These inputs are selected by the ADCH bits. Some
inputs are shared with I/O pins as shown in Figure 14-1. All of the channel assignments of the ADC for
the MC9S08AW60 Series devices are summarized in Table 14-1.
14.2 Channel Assignments
The ADC channel assignments for the MC9S08AW60 Series devices are shown in the table below.
Channels that are unimplemented are internally connected to V_REFL. Reserved channels convert to an
unknown value. Channels which are connected to an I/O pin have an associated pin control bit as shown.
ADCH
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
Channel
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
01011 AD11
01100 AD12
01101 AD13
Table 14-1. ADC Channel Assignment
Input
PTB0/ADC1P0
PTB1/ADC1P1
PTB2/ADC1P2
PTB3/ADC1P3
PTB4/ADC1P4
PTB5/ADC1P5
PTB6/ADC1P6
PTB7/ADC1P7
PTD0/ADC1P8
PTD1/ADC1P9
PTD2/ADC1P10/
KBI1P5
PTD3/ADC1P11/
KBI1P6
PTD4/ADC1P12/
TPM2CLK
PTD5/ADC1P13
Pin Control
ADPC0
ADPC1
ADPC2
ADPC3
ADPC4
ADPC5
ADPC6
ADPC7
ADPC8
ADPC9
ADPC10
ADPC11
ADPC12
ADPC13
ADCH
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
Channel
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
11011 AD27
11100
11101
—
V_REFH
Input
V_REFL
V_REFL
V_REFL
V_REFL
V_REFL
V_REFL
Reserved
Reserved
Reserved
Reserved
Temperature
Sensor¹
Internal Bandgap
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
Reserved
N/A
V_REFH
N/A
MC9S08AW60 Data Sheet, Rev 2
Freescale Semiconductor
233