KIT34704AEPEVBE 8-Channel Evaluation Board
, Rev. 1
Freescale Semiconductor
12
KIT34704AEPEVBE - Using Hardware
8.2
Input/Output power supply terminal blocks
A three-pin terminal block serves as the input terminal for the main power between 2.7
and 5.5V to operate the KIT34704AEPEVBE, as well as providing access to the
reference voltage VDDI generated by the MC34704A to supply configuration voltages.
Regulator 1 uses a three-pin terminal block to provide GND reference and VO1 output
at 5V with a maximum current capability of 500mA. It also provide access to the internal
Gate voltage VG for monitoring purposes
Regulator 2 through 8 use a two-pin terminal block to provide each GND reference and
VOx respectively. To learn how to configure the output voltage on each regulator, please
refer to the MC34704 datasheet that can be found at
www.freescale.com
The following diagram shows each of the terminals and its respective output voltage
identificator.
REG 2
REG 5
REG 4
REG 3
REG 8
REG 1
REG 6
REG7
VDDI / VIN
Figure 7. Input/Output terminal blocks
8.3
Starting up the KIT34704AEPEVBE
To Start working with the KIT34704AEPEVBE, provide an input voltage between 2.7V
and 5.5V connecting the (+) probe to the VIN terminal and the (-) probe to the GDN
terminal on the Input power terminal block. Turn on the power supply and the LEDRST
should turn on.
At this moment the three stand alone regulators (REG2, REG3 and REG4) should be
providing pre-configured output voltage. To operate the rest of the MC34704A functions,
it is necessary to use I
2
C communication.
Section 11 will discuss how to interact with the KIT34704AEPEVBE using the Graphical
User Interface developed by freescale to fully operate the MC34704A.