PCA8534AH-Q900 NXP [NXP Semiconductors], PCA8534AH-Q900 Datasheet - Page 34

• Manufacturer Part Number: PCA8534AH-Q900
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA8534A_2
Product data sheet
The contact resistance between the SYNC pins of cascaded devices must be controlled. If
the resistance is too high, the device will not be able to synchronize properly.
Table 20
Table 20.
The PCA8534A can always be cascaded with other devices of the same type or
conditionally with other devices of the same family. This allows optimal drive selection for
a given number of pixels to display.
synchronization signals.
Number of devices
2
3 to 5
6 to 10
11 to 16
Fig 23. Synchronization of the cascade for various PCA8534A drive modes
shows the maximum contact resistance values.
SYNC contact resistance
All information provided in this document is subject to legal disclaimers.
(1/2 bias)
(1/3 bias)
(1/3 bias)
(1/3 bias)
BP0
SYNC
SYNC
SYNC
SYNC
BP0
BP0
BP0
BP0
Rev. 02 — 1 June 2010
(b) 1:2 multiplex drive mode.
(c) 1:3 multiplex drive mode.
(d) 1:4 multiplex drive mode.
Figure 20
(a) static drive mode.
T
Universal LCD driver for low multiplex rates
fr
=
Maximum contact resistance
6000 Ω
2200 Ω
1200 Ω
700 Ω
and
f
1
fr
Figure 23
show the timing of the
PCA8534A
mgl755
© NXP B.V. 2010. All rights reserved.
34 of 44