MC9S08AW60 Datasheet, PDF(231/320 Page) Freescale Semiconductor, Inc – Microcontrollers

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MC9S08AW60 Datasheet, PDF (231/320 Pages) Freescale Semiconductor, Inc – Microcontrollers

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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 17 (AD0-AD15 and AD27) of the possible inputs are implemented on

the MC9S08AW60/48/32/16 Family 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

MC9S08AW60/48/32/16 devices are summarized in Table 14-1.

14.2 Channel Assignments

The ADC channel assignments for the MC9S08AW60/48/32/16 devices are shown in the table below.

Channels that are unimplemented are internally connected to VREFL. 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

01110

AD13

AD14

01111 AD15

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

PTD6/ADC1P14/

TPM1CLK

PTD7ADC1P15/

KBI1P7

Pin Control

ADPC0

ADPC1

ADPC2

ADPC3

ADPC4

ADPC5

ADPC6

ADPC7

ADPC8

ADPC9

ADPC10

ADPC11

ADPC12

ADPC13

ADPC14

ADPC15

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

â

11101

11110

VREFH

VREFL

11111 module

disabled

Input

VREFL

VREFL

VREFL

VREFL

VREFL

VREFL

Reserved

Reserved

Reserved

Reserved

Reserved

Pin Control

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Internal Bandgap

N/A

Reserved

N/A

VREFH

N/A

VREFL

N/A

None

N/A

MC9S08AW60 Data Sheet, Rev.1.0

Freescale Semiconductor

231

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