HCS08 datasheet(95/198 Pages) NXP

95 / 198 page

Chapter 8 Analog-to-Digital Converter (ADC10V1)

MC9S08QD4 Series MCU Data Sheet, Rev. 6

Freescale Semiconductor

8.1.1.1

Channel Assignments

The ADC channel assignments for the MC9S08QD4 series devices are shown in Table 8-1. Reserved

channels convert to an unknown value.

8.1.1.2

Alternate Clock

The ADC is capable of performing conversions using the MCU bus clock, the bus clock divided by two,

or the local asynchronous clock (ADACK) within the module. The alternate clock, ALTCLK, input for the

MC9S08QD4 series MCU devices is not implemented.

8.1.1.3

Hardware Trigger

The ADC hardware trigger, ADHWT, is output from the real-time interrupt (RTI) counter. The RTI counter

can be clocked by either ICSERCLK or a nominal 32 kHz clock source within the RTI block.

The period of the RTI is determined by the input clock frequency and the RTIS bits. The RTI counter is a

free running counter that generates an overflow at the RTI rate determined by the RTIS bits. When the

ADC hardware trigger is enabled, a conversion is initiated upon a RTI counter overflow.

Table 8-1. ADC Channel Assignment

ADCH

Channel

Input

Pin Control

ADCH

Channel

Input

Pin Control

00000

AD0

PTA0/ADC1P0

ADPC0

10000

AD16

VSS

N/A

00001

AD1

PTA1/ADC1P1

ADPC1

10001

AD17

VSS

N/A

00010

AD2

PTA2/ADC1P2

ADPC2

10010

AD18

VSS

N/A

00011

AD3

PTA3/ADC1P3

ADPC3

10011

AD19

VSS

N/A

00100

AD4

Vss

N/A

10100

AD20

VSS

N/A

00101

AD5

Vss

N/A

10101

AD21

VSS

N/A

00110

AD6

Vss

N/A

10110

AD22

Reserved

N/A

00111

AD7

Vss

N/A

10111

AD23

Reserved

N/A

01000

AD8

VSS

N/A

11000

AD24

Reserved

N/A

01001

AD9

VSS

N/A

11001

AD25

Reserved

N/A

01010

AD10

VSS

N/A

11010

AD26

Temperature

Sensor1

1 For information, see Section 8.1.1.5, “Temperature Sensor.”

N/A

01011

AD11

VSS

N/A

11011

AD27

Internal Bandgap2

2 Requires BGBE =1 in SPMSC1 see Section 5.8.8, “System Power Management Status and Control 1 Register (SPMSC1).”

For value of bandgap voltage reference see Appendix A.5, “DC Characteristics.”

N/A

01100

AD12

VSS

N/A

11100

VREFH

VDD

N/A

01101

AD13

VSS

N/A

11101

VREFH

VDD

N/A

01110

AD14

VSS

N/A

11110

VREFL

VSS

N/A

01111

AD15

VSS

N/A

11111

Module

Disabled

None

N/A

HCS08 bảng dữ liệu(PDF) 95 Page - NXP Semiconductors

HCS08 bảng dữ liệu(HTML) 95 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL