pcf8534a NXP Semiconductors, pcf8534a Datasheet - Page 30

• Manufacturer Part Number: pcf8534a
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
13. Application information
PCF8534A_3
Product data sheet
13.1 Cascaded operation
Large display configurations of up to 16 PCF8534As can be recognized on the same
I
I
Table 18.
If cascaded PCF8534As are synchronized, they can share the backplane signals from
one of the devices in the cascade. This is cost-effective in large LCD applications because
the backplane outputs of only one device need to be through-plated to the backplane
electrodes of the display. The other PCF8534As in the cascade contribute additional
segment outputs but their backplane outputs are left open-circuit (see
Cluster
1
2
2
2
C-bus by using the 3-bit hardware subaddress (A0, A1 and A2) and the programmable
C-bus slave address (SA0).
Addressing cascaded PCF8534A
Bit SA0
0
1
Rev. 03 — 10 November 2008
Pin A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Universal LCD driver for low multiplex rates
Pin A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Pin A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PCF8534A
Figure
© NXP B.V. 2008. All rights reserved.
Device
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
21).
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