Operating instructions

5-8 Controller Board
In the portable radio, only one of the two MAKO USB transceivers is used to provide the physical
layer signaling for the USB port. The transceiver generates and receives the DP and DM differential
signals of the port. The MAKO transceiver interfaces to the OMAP processor through a three-wire
interface consisting of two bi-directional signals (SE0 and DAT), and one uni-directional signal
(TXEN). The MAKO also includes a Vbus monitor that senses the connection or removal of a device
and determines whether or not to supply current to that device via Q3000 up to a high current limit of
500mA.
The USB host/device mode assignment is determined when a user attaches a USB device to the port.
The accessory contains information about what the USB mode assignment should be, this
information is sent to the radio via the ACC_ID. See section 2.5 on page 5-7 for more details on the
ACC_ID implementation. When configured as a host, VBUS is turned ON by MAKO and set to high
current limit, when configured as a device, VBUS will be shut OFF and the external host supplies the
VBUS power.
2.7 Universal Connector (Side Connector)
The universal connector is located on the side of the radio. It is the external port of interface used for
programming and interfacing to external accessories. The universal connector is connected to the
main board via a flex through option board. This radio UC is a newly defined Motorola accessory port
that contains audio, digital I/O, serial interfaces, and accessory supply lines; and is similar in function
to Motorola’s legacy microphone connectors. The multiplexing of these functions is handled by
circuitry internal to the MAKO (U3000).
The UC includes 2 serial interfaces: an USB port and an ACC_ID interface. The USB port can be
used as either a device (radio is device) or as a host (radio is host). When configured as a device, the
radio can be programmed using the MOTOTRBO CPS or tuned using the Tuner software. When
configured as a host, various smart accessories can be used with the radio. See section 2.6 on page
5-7 for more information on the USB interface.
The ACC_ID interface is used by accessories to provide the radio with information needed to
configure the interface for that accessory. See section 2.5 on page 5-7 for more information on the
ACC_ID interface.
Note: The USB port is designed to support Motorola accessories only and will not support third
part “Plug-n-Play” USB devices.
2.8 Keypad Module
The keypad module is connected to the main board through option board. This unit is not considered
field-repairable. The keypad interface is a standard pulsed 4 row by 4 column configuration controlled
directly by the OMAP processor (U1000). Each of the 4 column output lines is toggled high in
sequence and the 4 row input lines are monitored to detect if a button has been pressed. The OMAP
processor then decodes which button was pressed using the appropriate column and row stimulus
and response information.
2.9 Display Module
This display is Film-compensated Super Twisted Nematic (FSTN), 132x34 pixel dot matrix with
transflective mode and yellow-green LEDs backlighting Liquid Crystal Display (LCD) module custom
to Motorola.
This display module is constructed of glass by sandwiched with polarizers, TAB (Tape Automated
Bonding) IC driver, LED backlighting, display control circuitry flex with 16-lines receptacle connector
connected to the main board display connector (P9000). The LED and backlights are controlled via
serial connection with OMAP processor (U1000). The serial interface consists of clock, data, and chip
select lines that are connected directly from the OMAP processor.