DRM050 — Rev 0 Designer Reference Manual
MOTOROLA Multimedia Keyboard Transmitter 27
Designer Reference Manual — DRM050
Section 5. Multimedia Keyboard Transmitter
5.1 Introduction
The LK24 has a built-in PLL with a low frequency crystal (32.768 kHz)
and is able to operate as fast as 4 MHz bus speed at 3.3 V. It contains
enough I/O pins for key matrix scanning. The main features of the
keyboard include:
• 2.4-GHz RF Link
• 1 Mbps data rate
• Power management keys (power, wake and sleep) support
• Multimedia keys support
5.2 System Overview
The keyboard transmitter consists of the LK24, the baseband IC and RF
Module from RFWaves, and DC/DC converter. Figure 5-1 shows the
block diagram of the system.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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