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PCF8545 데이터시트(PDF) 33 Page - NXP Semiconductors

부품명 PCF8545
상세설명  Universal LCD driver for multiplex rates up to 1:8
PDF  68 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8545 데이터시트(HTML) 33 Page - NXP Semiconductors

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NXP Semiconductors
PCF8545
Universal LCD driver for multiplex rates up to 1:8
0 1 2 3 4 5 6 7
37 38 39 40 41
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 addresses (columns)/segment outputs (S)
Columns
Display RAM
bits (rows)/
backplane outputs
(BP)
Rows
013aaa457
Figure 22. Display RAM filling order in 1:6 multiplex drive mode
The remaining bits are wrapped over into the next column. In order to fill the whole RAM,
31 and a half bytes need to be sent to the PCF8545. After the last byte sent, the data
pointer must be reset before the next RAM content update. Additional data bytes sent
and any data bits that spill over the RAM are discarded. Depending on the start address
of the data pointer, there are three possible boundary conditions. See Figure 23.
PCF8545
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 2 — 4 October 2021
33 / 68



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