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Hardware Description
4
4.1
Hardware Description
The hardware in this evaluation kit includes an 33988 evaluation board. The evaluation board has three
major blocks: the circuit related to the 33988, the remote control and accessory simulator (SPI Gen) and
the parallel cable. This section describes the above three blocks.
Using the EVB
Parallel Port Cable
PC
33988CEVBE
VBAT
SB SA
Connects to Loads
Battery / Power Supply
Warning: Always wear Safety Glasses when working around electronic modules and when soldering.
Please remove of the capacitor, C8, when testing reverse supply voltage on VBAT. Also that the thermal
resistance from junction to ambience of this PCB is approximately 25 degree/W.
1. The 33988 Evaluation card allows the customer to quickly evaluate features of the device with a simple
bench top setup. All switch inputs may be evaluated using the onboard switch banks or actual system
switches connected to the switch input edge connector.
2. Using a standard 25 pin Sub-D parallel port cable and the enclosed SPIGen SPI Driver software, you
can use a personal computer to provide the Serial Peripheral Interface (SPI) communication with this
EVB (see SETUP_EVB).
3. Connect power supplies to the VBAT on the VBAT bolt. Connect GND, GNDBAT and +12 volt supply
on connector X, EVB's power terminal. On board 5 volt regulator supply can be either supplied through
VBAT or +12V by selecting the jumper JSUPPLY. Make sure the voltages provided are in accordance
with the device data sheet and that the supply currents are sufficient to supply the attached loads. The
led L5V should light up indicating the presence of 5 volt regulated supply. Move IC from reset state by
shorting jumper JRSTB to 2-3 position (It short RSTB PIN to VDD).
4. Connect the desired loads to(e.g. relay coils, LEDs, or panel lamps) SB and SA bolt.
5. For direct control of SA, put jumper, JINA, at position 2-3. For direct control of SB, put jumper, JINB, at
position 2-3. Disable watchdog placing a jumper at JFSI on position1-2 (shorting the PIN to GND) and
not placing jumper on JWAKE. (Shorting PIN to GND). Led LA and LB should light up if jumper are
placed on JLA and JLB.
6. To use SPIGen, Go to the Windows Start menu, then Programs, then SPIGen, and click on the
SPIGen icon. The SPIGen “Generic SPI Generator” GUI will appear. Go to the File menu in the upper
left hand corner of the GUI, and select Open, then browse the CD to find and select the
KIT33988CEVBE Evaluation Board , Rev. 1.0
Freescale Semiconductor
5
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