Motorola APX 2000 - Controller

Theory of Operation: Controller 3-21
3.2 Controller
3.2.1 Controller Overview
This section provides a detailed circuit description of the APX 1000 controller design. The controller
design consists of the following board and flexes:
Printed Circuit Boards
• Main Board
• Keypad Board
Flexes
• GCAI (Global Core Accessory Interface) (BT Antenna/TX/RX LED)
• Side Controls
• Backkit (keypad)
• Frontkit (audio/speaker/knob/front display)
•Mic
The controller interconnection diagram (Figure 3-13.) shows the various physical components of the
design, along with how they are all connected. It also shows the key distinguishes between a flex
connection and a board-to-board connection. A brief description of each of the components is
provided below.
Figure 3-13. Controller Interconnection Diagram
Keypad
Board
GCAI
Front display
Speaker
and knob
Side
control
Main board
Mic