PCF8545 datasheet(32/68 Pages) NXP

32 / 68 page

NXP Semiconductors

PCF8545

Universal LCD driver for multiplex rates up to 1:8

0 1 2 3 4 5 6 7

39 40 41 42 43

MSB

LSB

Transmitted data byte

Display RAM addresses (columns)/segment outputs (S)

Columns

Display RAM

bits (rows)/

backplane outputs

(BP)

Rows

013aaa455

Figure 20. Display RAM filling order in 1:4 multiplex drive mode

Depending on the start address of the data pointer, there is the possibility for a boundary

condition. This occurs when more data bits are sent than fit into the remaining RAM. The

additional data bits are discarded. See Figure 21.

0 1 2 3 4 5 6 7

39 40 41 42 43

MSB

LSB

Transmitted data byte

013aaa456

Discarded

Display RAM addresses (columns)/segment outputs (S)

Columns

Display RAM

bits (rows)/

backplane outputs

(BP)

Rows

Figure 21. Boundary condition in 1:4 multiplex drive mode

7.9.3 RAM filling in 1:6 multiplex drive mode

In the 1:6 multiplex drive mode the RAM is organized in six rows and 42 columns. The

eight transmitted data bits are placed in such a way, that a column is filled up (see

Figure 22).

PCF8545

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 2 — 4 October 2021

32 / 68

PCF8545 데이터시트(PDF) 32 Page - NXP Semiconductors

PCF8545 데이터시트(HTML) 32 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

데이터시트 다운로드

링크 URL