DVR21 datasheet(292/416 Pages) MICROCHIP

部件名	DVR21

功能描述	16-Bit General Purpose Microcontrollers with 256-Kbyte Flash and 16-Kbyte RAM in Low Pin Count Packages

PDF	416 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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292 / 416 page

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DS30010118D-page 292

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FIGURE 24-2:

EXAMPLE OF BUFFER ADDRESS GENERATION IN PIA MODE

(4-WORD BUFFERS PER CHANNEL)

Data RAM

Destination

A/D Module

(PIA Mode)

BBA

DMA Channel

DMADSTn

nn (0-3)

1000h (DMA Base Address)

Range

Channel

ccccc (0-31)

000 cccc cnn0 (IA)

1000h

DMABL<2:0> = 010

(Four Words Per Input)

1008h

1010h

1018h

10F8h

1100h

Ch 0 Buffer (4 Words)

Ch 1 Buffer (4 Words)

Ch 2 Buffer (4 Words)

Ch 3 Buffer (4 Words)

Ch 27 Buffer (4 Words)

Ch 29 Buffer (4 Words)

Ch 31 Buffer (4 Words)

10F0h

(Buffer Base Address)

1000h

1002h

1004h

1006h

Ch 0, Word 0

Ch 0, Word 1

Ch 0, Word 2

Ch 0, Word 3

Ch 1, Word 0

Ch 1, Word 1

Ch 1, Word 2

Ch 1, Word 3

1008h

100Ah

100Ch

100Eh

0001 0000 0000 0000

0001 0000 0000 0010

0001 0000 0000 0100

0001 0000 0000 0110

0001 0000 0000 1000

0001 0000 0000 1010

0001 0000 0000 1100

0001 0000 0000 1110

DMA Base Address

Address Mask

Channel Address

Buffer Address

1038h

1040h

Ch 7 Buffer (4 Words)

Ch 8 Buffer (4 Words)

DVR21 数据表(PDF) 292 Page - Microchip Technology

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