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PCA9620 датащи(PDF) 44 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) 44 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
44 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
In order to fill the whole four RAM rows 30 bytes need to be sent to the PCA9620. After
the last byte sent, the data pointer is wrapped around to column 0 to start a possible RAM
content update (see Figure 36). Even if a data byte is transmitted during the wrapping of
the data pointer, all the bits in the byte will be written correctly.
7.9.1.4
RAM filling in 1:6 multiplex drive mode
In the 1:6 multiplex drive mode the RAM is organized in six rows and 60 columns. The
eight transmitted data bits are placed in such a way, that a column is filled up (see
Figure 37).
Fig 35. Display RAM filling order in 1:4 multiplex drive mode
Fig 36. Data pointer wrap around in 1:4 multiplex drive mode
0
1
2
34
56
7
55 56 57 58 59
b0
b1
b2
b3
b4
b5
b6
b7
0
MSB
LSB
1
2
3
transmitted data byte
b7
b6
b5
b4
b3
b2
b1
b0
display RAM columns/segment outputs (S)
columns
display RAM rows/
backplane outputs
(BP)
rows
013aaa265
0
1
2
34
56
7
55 56 57 58 59
0
1
2
3
b7
b6
b5
b4
b3
b2
b1
b0
display RAM columns/segment outputs (S)
columns
display RAM
data pointer
013aaa289
wrap around



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