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PCA9620 Datasheet(PDF) 10 Page - NXP Semiconductors

Part # PCA9620
Description  Universal LCD driver for low multiplex rates
PDF  71 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9620 Datasheet(HTML) 10 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
10 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
7.1.12 Bank select commands
For multiplex drive modes 1:4, 1:2 and static drive mode, it is possible to write data to one
area of the RAM whilst displaying from another. These areas are named as RAM banks.
Input and output banks can be set independently from one another with the
input-bank-select and the output-bank-select command. For further information see
Section 7.9.2 on page 46.
7.1.12.1
Command: input-bank-select
[1]
Not applicable for multiplex drive mode 1:6 and 1:8.
[2]
Default value.
7.1.12.2
Command: output-bank-select
[1]
Not applicable for multiplex drive mode 1:6 and 1:8.
[2]
Default value.
Table 18.
Input-bank-select - input bank select command bit description[1]
Bit
Symbol
Value
Description
7 to 3
-
00001
fixed value
2 to 0
IB[2:0]
selects RAM bank to write to
static drive mode
1:2 drive mode
1:4 drive mode
000[2]
bank 0: RAM-row 0
bank 0: RAM-rows 0
and 1
bank 0: RAM-rows 0,
1, 2, and 3
001
bank 1: RAM-row 1
010
bank 2: RAM-row 2
bank 2: RAM-rows 2
and 3
011
bank 3: RAM-row 3
100
bank 4: RAM-row 4
bank 4: RAM-rows 4
and 5
bank 4: RAM-rows 4,
5, 6, and 7
101
bank 5: RAM-row 5
110
bank 6: RAM-row 6
bank 6: RAM-rows 6
and 7
111
bank 7: RAM-row 7
Table 19.
Output-bank-select - output bank select command bit description[1]
Bit
Symbol
Value
Description
7 to 3
-
00010
fixed value
2 to 0
OB[2:0]
selects RAM bank to read from to the LCD
static drive mode
1:2 drive mode
1:4 drive mode
000[2]
bank 0: RAM-row 0
bank 0: RAM-rows 0
and 1
bank 0: RAM-rows 0,
1, 2, and 3
001
bank 1: RAM-row 1
010
bank 2: RAM-row 2
bank 2: RAM-rows 2
and 3
011
bank 3: RAM-row 3
100
bank 4: RAM-row 4
bank 4: RAM-rows 4
and 5
bank 4: RAM-rows 4,
5, 6, and 7
101
bank 5: RAM-row 5
110
bank 6: RAM-row 6
bank 6: RAM-rows 6
and 7
111
bank 7: RAM-row 7



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