OM6279,598 NXP Semiconductors, OM6279,598 Datasheet - Page 15

• Manufacturer Part Number: OM6279,598
• Description: DEMO BOARD LED DIMMER
• Manufacturer: NXP Semiconductors

Specifications of OM6279,598

• Main Purpose: Lighting, RGB LED Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: PCA9564PW, PCA9555PW, PCA9531PW, PCA9533DP/01
• Primary Attributes: I2C Bus Controller, 1 8-Bit GPIO, 1 8-Bit LED Dimmer
• Secondary Attributes: Different Demonstration Programs Through MCU
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 568-4003; 935283363598

Philips Semiconductors
9397 750 14062
Application note
4.5 Emulation mode: battery discharge application
4.6 Auto Demo routine
4.7 RESET
Emulation mode can be described as a mode that would require external ‘stimulus’ to
show an application in a real environment. The example in the firmware shows a simple
application where a battery discharge (for example in a cell phone application) is emulated
by pushing a key. A LED controlled by a PCA9531 is used to provide visual status of the
battery level:
Table 11:
Remark: Keys in this routine have been programmed to detect a continuous push applied
to them. When pushed continuously, (+) or (-) action is performed continuously.
The Auto Demo routine shows some light effects real time RGB mixing without having to
push any buttons.
Remark: Once the Auto Demo Mode starts (after pushing key 4), the user must use the
RESET button to exit the mode.
The RESET button located in the Keypad Control Card allows the user to reinitialize the
P89LV51RD2 and the I
again at the beginning point and initiates the dialing routine.
Step
1
2
3
4
5
•
•
•
•
•
•
•
•
Emulation mode is entered by pushing key F2. LD11 starts blinking.
Pushing key 1 starts battery discharge emulation.
– LD5 to LD8 are on, indicating a fully charged battery (100 %).
– LD9 blinks slowly (1 Hz) and high duty cycle, with a Green color.
Pushing continuously Key 3 emulates a battery discharge (from 100 % with LD5 to
LD8 on, down to 0 % with LD5 to LD8 off). The different steps are explained in
Table
LED duty cycle (shorter duty cycle) to catch the user’s attention when using their cell
phone.
A reset of the emulation is performed by pushing key 6. Battery is then fully charged.
Pushing key END exits the battery discharge emulation mode. LD5 to LD9 are off.
Pushing again key END exits the Emulation mode. LD11 stops blinking.
Emulation mode is entered by pushing key F2. LD11 starts blinking
Pushing key 4 starts the auto demo mode
Battery charge
100 %
75 %
50 %
25 %
0 %
11. Principle is to change the LED color (Green, Orange, Red) and the
Battery discharge steps
Rev. 01 — 7 January 2005
2
C devices and go to a known state. It causes the firmware to start
LD5
ON
OFF
OFF
OFF
OFF
LD6
ON
ON
OFF
OFF
OFF
LD7
ON
ON
ON
OFF
OFF
LD8
ON
ON
ON
ON
OFF
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
LD9
Green - 1 Hz - 93 % duty cycle
Green - 1 Hz - 93 % duty cycle
Orange - 1 Hz - 50 % duty cycle
Red - 1 Hz - 6 % duty cycle
Red - 1 Hz - 0.4 % duty cycle
LED dimmer demoboard
AN10315
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