HSDL-9100 Ver la hoja de datos (PDF) - Avago Technologies
Número de pieza
componentes Descripción
fabricante
HSDL-9100 Datasheet PDF : 13 Pages
| |||
Appendix B: General Application Guide for the HSDL-9100
Description
The Proximity sensor has several possible applications for
multimedia product, Automation, and Personal handled.
The proximity sensor is basically made up of the emitter
(infrared LED) and detector (photodiode). The block
diagram of the sensor is shown in Figure 13. The emitter
will emit IR light pulse. This light travels out in the field
of view and will either hit an object or continue. No light
will be reflected when no object is detected. On the other
hand, the detector will detect the reflected IR light when
it hits the object.
Interface to the Recommended I/O chip
The HSDL-9100 is general interface with the GPIO pin of
the controller chipset. The LED_A, pin1 is connected to
the PWM port alternatively the external timer circuitry
can be used to drive the LED. The DET_K, pin 4 is interface
to the signal conditioning before driving the GPIO port.
Figure 14 shows the hardware reference design with
HSDL-9100.
Photodiode
anode
Photodiode
3
4
Photodiode
cathode
LED
cathode
2
LED
1
LED
anode
Figure 13. Proximity sensor block diagram
(refer to Pins Configuration Table)
STN/TFT LCD Panel
Key Pad
Touch Panel
LCD Control
A/D
Peripherial
interface
IrDA
interface
Mobile Application
chipset
AC97
sound
IR Transceiver
PCM Sound
Memory Expansion
Logic Bus Driver
Memory I/F
Baseband
controller GPIO
I2S
PWM
Audio Input
ROM
FLASH
SDRAM
Power Management
Antenna
Signal Conditional
*IR LED driver
* The LED can be driven by the PWM output or the external timer circuitry.
Figure 14. Mobile Application Platform
11
HSDL-9100
Share Link: 