KIT34825EPEVME Evaluation Board
, Rev. 2.0
4
Freescale Semiconductor
Introduction
3
Introduction
This KIT34825EPEVME evaluation kit is for demonstrating the capability and features of the 34825 and
is aimed to make it easy for users to evaluate the performance of the 34825. The KIT34825EPEVME
evaluation kit contains an 34825 evaluation board, a graphic user interface (GUI) software for personal
computers (PC), and connection cables.
The 34825 is designed to support the Universal Charging Solution (UCS) recommended by the OMTP
(Open Mobile Terminal Platform) as well as to use the same 5-pin micro or mini-USB connector for other
wired accessories. A typical application circuit is shown in
. The 34825 offers five pins (VBUS,
ID, DP, DM, and GND) to directly interface to the mini or micro-USB connector. Accessories are
connected to the evaluation kit (which simulates a cell phone system) through the mini-USB connector.
The 34825 also offers pins to interface to the USB, audio, UART, the I2C bus, and the interrupt (INT)
signals of the baseband in the cell phone system.
All these signals are simulated by the evaluation kit so
users do not need to generate them.
I2C
VDDIO
I2C_SCL
Baseband
34825
I2C_SDA
INT
RXD
D-
TXD
D+
SPK_L
ID
DP
DM
SPK_R
MIC
ISET
OUT
VBUS
VDD
GND
Charger
GPIO
UART
USB XCVR
AUDIO
V
BUS
ID
D+
D-
GND
USB Connector
LI+
Figure 2. The Typical Application Circuit of 34825
The evaluation kit is designed to work together with a PC running Microsoft Windows for easy
demonstration or evaluation. All baseband signals in
are generated by the evaluation kit with
the help from the PC, so the user does not need to provide special equipment. The 34825 evaluation
board contains an MCU block to generate the I2C signals to control the 34825 and to receive the interrupt
signal from the 34825 using a GPIO pin. The MCU block is controlled by the PC with the GUI via a USB
connection. The PC together with the MCU block simulates the host device of the I2C bus and the
interrupt interface of the baseband circuit in a cell phone system. The evaluation kit uses the PC to obtain
the audio signals and a USB flash memory device to generate the D+ and D- signals. The UART signals
can be obtained from the MCU block but is not enabled in this version of the MCU firmware.
The evaluation board offers other features for the simplification of the evaluation. A remote control
simulator is offered for simulation the remote control buttons. An accessory simulator allows users to
simulate the attachment or detachment of accessories without connecting a real accessory to the
mini-USB connector. LEDs are used to indicate two logic outputs. Jumpers are offered for configuration
of the evaluation board. The evaluation board offers all test points needed for evaluation of the 34825 or
directly connecting the IC to a real cell phone printed circuit board (PCB) with jumping wires.
