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PCA9620 датащи(PDF) 41 Page - NXP Semiconductors

номер детали PCA9620
подробное описание детали  Universal LCD driver for low multiplex rates
PDF  71 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9620 датащи(HTML) 41 Page - NXP Semiconductors

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PCA9620
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 1 — 9 December 2010
41 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
7.9.1 Data pointer
The addressing mechanism for the display RAM is realized using the data pointer. This
allows the loading of an individual display data byte, or a series of display data bytes into
any location of the display RAM. The sequence commences with the initialization of the
data pointer by the load-data-pointer command. Following this command, an arriving data
byte is stored starting at the display RAM address indicated by the data pointer.
The display RAM bitmap shows the direct relationship between the display RAM column and the
segment outputs, between the bits in a RAM row and the backplane outputs, and between the
RAM rows and banks.
Fig 30. Display RAM bitmap
display RAM columns/segment outputs (S)
display RAM rows/
backplane outputs
(BP)
013aaa262
columns
rows
0
1
2
3
4
5
6
7
01
2
3
4
55
56
57
58
59
0
1
2
3
4
5
6
7
01
2
3
4
55
56
57
58
59
0
1
2
3
4
5
6
7
01
2
3
4
55
56
57
58
59
bank 0
bank 1
bank 2
bank 3
bank 4
bank 5
bank 6
bank 7
bank 0
bank 2
bank 4
bank 6
bank 0
bank 4
static drive mode
multiplex 1:2 drive mode
multiplex 1:4 drive mode



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