PIC876 datasheet(114/218 Pages) MICROCHIP

114 / 218 page

PIC16F87X

DS30292C-page 112

 2001 Microchip Technology Inc.

ADCON1 REGISTER (ADDRESS 9Fh)

The ADRESH:ADRESL registers contain the 10-bit

result of the A/D conversion. When the A/D conversion

is complete, the result is loaded into this A/D result reg-

ister pair, the GO/DONE bit (ADCON0<2>) is cleared

and the A/D interrupt flag bit ADIF is set. The block dia-

gram of the A/D module is shown in Figure 11-1.

After the A/D module has been configured as desired,

the selected channel must be acquired before the con-

version is started. The analog input channels must

have their corresponding TRIS bits selected as inputs.

To determine sample time, see Section 11.1. After this

acquisition time has elapsed, the A/D conversion can

be started.

U-0

R/W-0

U-0

R/W-0

ADFM

—

PCFG3

PCFG2

PCFG1

PCFG0

bit 7

bit 0

bit 7

ADFM: A/D Result Format Select bit

= Right justified. 6 Most Significant bits of ADRESH are read as ‘0’.

= Left justified. 6 Least Significant bits of ADRESL are read as ‘0’.

bit 6-4

Unimplemented: Read as '0'

bit 3-0

PCFG3:PCFG0: A/D Port Configuration Control bits:

Note 1: These channels are not available on PIC16F873/876 devices.

2: This column indicates the number of analog channels available as A/D inputs and

the number of analog channels used as voltage reference inputs.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

- n = Value at POR

’1’ = Bit is set

’0’ = Bit is cleared

x = Bit is unknown

A = Analog input

D = Digital I/O

PCFG3:

PCFG0

AN7(1)

RE2

AN6(1)

RE1

AN5(1)

RE0

AN4

RA5

AN3

RA3

AN2

RA2

AN1

RA1

AN0

RA0

VREF+VREF-

CHAN/

Refs(2)

0000

VDD

VSS

8/0

0001

VREF+A

RA3

VSS

7/1

0010

DDD

VDD

VSS

5/0

0011

DDD

VREF+A

RA3

VSS

4/1

0100

DDD

VDD

VSS

3/0

0101

DDD

VREF+D

RA3

VSS

2/1

011x

DDD

VDD

VSS

0/0

1000

VREF+VREF-A

RA3

RA2

6/2

1001

VDD

VSS

6/0

1010

VREF+A

RA3

VSS

5/1

1011

VREF+VREF-A

RA3

RA2

4/2

1100

DDD

VREF+VREF-A

RA3

RA2

3/2

1101

DDD

VREF+VREF-A

RA3

RA2

2/2

1110

DDD

VDD

VSS

1/0

1111

DDD

VREF+VREF-D

RA3

RA2

1/2

PIC876 датащи(PDF) 114 Page - Microchip Technology

PIC876 датащи(HTML) 114 Page - Microchip Technology

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

датащи скачать

ссылки URL