OM6279,598 NXP Semiconductors, OM6279,598 Datasheet - Page 12

• 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
4.3.3 Application: cell phone type keyboard—Dialing routine
The firmware in the P89LV51RD2 targets a cell phone type application where the keypad
is used to dial phone numbers and access to a programming mode in order to access the
RGB and White LEDs.
When dialing a phone number (keys 0 to 9 are used), the pushed key value is displayed
using its binary code with LD5 (MSB) to LD8 (LSB).
Table 4:
Note that a maximum of 10 keys can be pushed when dialing a phone number. If more
than 10 keys are entered, LD5 to LD8 will start flashing at 1 Hz / 50 % duty cycle to let the
user know that the maximum number has been reached.
After dialing the number, the user has to push the SND key to send the number or the
END key to end the call. LD5 to LD8 become off when those 2 keys are pushed.
When SND is pushed, all eight RGB LEDs will blink at 1 Hz / 50 % duty cycle with either a
red color (visual emulating a ‘busy’ line) or a green color (visual emulating a ‘non busy’
line).
Pushing END ends the call and the RGB LEDs (Red or Green) are off.
Remark: To dial a number, the user needs to be sure that the programming mode is not
enabled (LD12 is not blinking) or the emulation mode is not enabled (LD11 is not blinking).
If the demoboard is either in the programming mode or in the emulation mode, the END
key must be pushed one or two times (depending which branch of the firmware is active)
until LD11 and LD12 are off. A reset can also be performed to reach the dialing routine.
0
1
2
3
4
5
6
7
8
9
KEY
Binary code for numbers from 0 to 9
LD5
♦
♦
Rev. 01 — 7 January 2005
LD6
♦
♦
♦
♦
LD7
♦
♦
♦
♦
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
LD8
♦
♦
♦
♦
♦
LED dimmer demoboard
AN10315
12 of 45