KT33882UG, Rev. 1.0
Freescale Semiconductor
7
Getting to Know the Hardware
3.5
Board Description
The analog part consists of the MC33882 chip controlling external loads. The digital part consists of the KL25Z controlling the MC33882
by SPI and I/Os.
This evaluation board is meant to demonstrate how the MC33882 can control eight low-side switches.
Power is provided to the board via a VPWR/GND screw terminal (J1). Power can be disconnected from the board via an onboard switch
(SW1). If power is ON, LED D3 will light up. The VDD input of the device can only accept 5.0 V. However, on-board level shifters are
provided to shift 3.3 V levels up to 5 V. Note the KL25Z FSD uses a 3.3 V microcontroller.
The evaluation board provides a 20-pin connector (J2) to be used with the FRDM board. The connector J2 on the FRDM board connects
to J2 on the evaluation board. The outputs of the switches are routed to independent 2-position screw terminals that have both one output
and VPWR available (J3 through J10).
The evaluation board also includes several test points. A 16-pin row of pins allows access to all incoming signals. These sixteen signals
are the following: MODE_B, IN4&IN5, IN2&IN3, IN0&IN1, CLK, MISO, MOSI, CS, IN0, IN1, IN2, IN3, IN4, IN5, IN6, and IN7. Eight loop
test points provide access to the OUT0 through OUT7 signals. Two ground test points (GND1 and GND2) are available, as are three power
test points (3V3, 5V, and VPWR).
Figure 3. Board Description
Table 2. Board Description
Name
Description
Output Terminals
•
Provides connection points for loads
Dual IN Function Selection Jumpers
•
Allows the FSD to control one of two different signals (
See Jumper Definitions on page 11
for more information)
FSD Connector
•
Allows a FSD to be connected to the evaluation board via a 20-pin ribbon cable
Test Points
•
Provides test points for various signals (
See Test Point Definitions on page 8
for more in-
formation)
Power and Ground Inputs
•
Provides connection points for power and ground
Power and Ground Inputs
ON/OFF Switch
FSD Connector
Dual IN Function
Selection Jumpers
Test points
Output Terminals
Output Terminals
MC33882
