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PCA9620 데이터시트(PDF) 45 Page - NXP Semiconductors

부품명 PCA9620
상세설명  Universal LCD driver for low multiplex rates
PDF  71 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9620 데이터시트(HTML) 45 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
45 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
The remaining bits are wrapped up into the next column. In order to fill the whole RAM
addresses 45 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 38). Even if a data byte is transmitted during the wrapping of the data pointer, all
the bits in the byte will be written correctly.
7.9.1.5
RAM filling in 1:8 multiplex drive mode
In the 1:8 multiplex drive mode the eight transmitted data bits are placed into eight rows of
one display RAM column (see Figure 39).
Fig 37. Display RAM filling order in 1:6 multiplex drive mode
Fig 38. Data pointer wrap around in 1:6 multiplex drive mode
0
1
2
3
4
5
6
7
5556575859
a0
a1
a2
a3
a4
a5
a6
a7
0
MSB
LSB
1
2
3
4
5
transmitted data bytes
a7
a6
a5
a4
a3
a2
a1
a0
b0
b1
b2
b3
b4
b5
b6
c0
c1
c2
c3
c4
c5
c6
b7
c7
b7
b6
b5
b4
b3
b2
b1
b0
c7
c6
c5
c4
c3
c2
c1
c0
display RAM columns/segment outputs (S)
columns
display RAM rows/
backplane outputs
(BP)
rows
013aaa266
data pointer
incrementation
0
1
2
3
4
5
6
7
5556575859
0
1
2
3
4
5
a7
a6
a5
a4
a3
a2
a1
a0
b7
b6
b5
b4
b3
b2
b1
b0
c7
c6
c5
c4
c3
c2
c1
c0
display RAM
data pointer
013aaa290
wrap around



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