PCF8536AT/1 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

MFG CO.

PCF8536AT/1

Universal LCD driver for low multiplex rates including a 6 channel PWM generator

NXP Semiconductors. 

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NXP Semiconductors

PCF8536

Universal LCD low multiplex driver with 6 channel PWM generator

Intensity of

visible flickering

Flickering is most

visible when fPWM

and ffr(LCD) are within

10 Hz of each other

In general, the higher the PWM frame

frequency, the less flickering will be visible

Flickering is also visible at multiples

of the fundamental frequency;

however, the visibility is lower

Flickering will not be

visible when fPWM

and ffr(LCD) are more

than 50 Hz apart

f1

Where f0 = fPWM and f1 = ffr(LCD) or f1 = fPWM and f0 = ffr(LCD).

Fig 8. Flicker avoidance for LED backlighting

2f1

f0

This will repeat for 3f1, 4f1, etc.

013aaa449

8.1.11 Command: GPO-static-data

When static GPOs are selected instead of PWM, then the value for the output is taken

from these register bits. The output is a static level.

PCF8536

Product data sheet

Table 24. GPO-static-data - write GPO data for GP0 to GP5 command bit description

Bit

Symbol

Value

Description

GPO0 to GPO2

7 to 3 -

0110 0

fixed value

2

GPO0

0[1]

0 level output on pin GP2

1

1 level output on pin GP2

1

GPO1

0[1]

0 level output on pin GP1

1

1 level output on pin GP1

0

GPO2

0[1]

0 level output on pin GP0

1

1 level output on pin GP0

GPO3 to GPO5

7 to 3 -

0110 1

fixed value

2

GPO3

0[1]

0 level output on pin GP5

1

1 level output on pin GP5

1

GPO4

0[1]

0 level output on pin GP4

1

1 level output on pin GP4

0

GPO5

0[1]

0 level output on pin GP3

1

1 level output on pin GP3

[1] Default value.

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

Rev. 1 — 6 October 2011

© NXP B.V. 2011. All rights reserved.

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