Qy4 Microcontroller; Optical Mouse Sensor; Transmitter Block Diagram - Motorola M68HC08 Designer Reference Manual

Optical Mouse Transmitter
LOOP
ANTENNA
CRYSTAL
OSCILLATOR
AMP
(DISCRETE)
13.5225 MHz/
13.5725 MHz
Z-AXIS ENCODER
IR
Z LED

4.2.1 QY4 Microcontroller

4.2.2 Optical Mouse Sensor

DRM055
20
Freescale Semiconductor, Inc.
BUTTONS
L
C
R
ID
DGND
RF DATA
RF_OFF
LD3
IR Rx MODULE
750
Figure 4-1. Transmitter Block Diagram
The functions of the QY4 are:
• To get the XY displacement from the sensor
• Detect the Z displacement
• Check button status
• Control the RF circuitry to send out data
• Perform the overall power management
Three standard left, middle, and right buttons together with one button for the
identity device (ID) code are implemented. The ID code can either be stored in
the RAM or in the FLASH of the QY4. When the ID button in the transmitter and
the one in the receiver are pressed, a random ID code is generated at the
transmitter and sent to the receiver. After receiving the new ID code, the
receiver stores it in the FLASH of the receiver MCU.
The ADNS-2030 is a 3-V supply sensor is specially design for wireless optical
mouse applications. The communication between the sensor and the QY4 is
through a serial peripheral interface (SPI) with clock input at the SCLK pin and
bidirectional data interface at the SDIO pin. The power down (PD) pin is used
to power down the sensor when not in use.
Optical Mouse Transmitter
For More Information On This Product,
Go to: www.freescale.com
MC68HC908QY4 ADNS2003
PTA5
PTB7 SCLK
PTA4
PTB6 SDIO
PTA3
PTB5 PD
PTA0
PTA1/TCH1
PTB2
PTB0
PTB1
PTB3
(16-PIN PDIP) (16-PIN PDIP)
High Data Rate Wireless USB Optical Mouse Solution
IMAGE
SENSOR
XY_LED
OSC_IN
18 MHz
OSC_OUT
REFA
+
100 nF 2u2 F
REFB
R_BIN
27 K
A GND
MOTOROLA