KIT33811EGEVBE Evaluation Board
, Rev. 2.0
Freescale Semiconductor
7
Hardware Description
together with the USB/SPI Dongle (KITUSBSPIDGLEVME) that provides a SPI
interface plus 9 parallel logic level outputs, CNTL0-3 and DATA0-4. The CNTL outputs
are used to control the Output_Enable on the 33810, the RESET on the 33811 and to
steer the CS on the 33810 and 33811 to allow the SPI port to be shared between the
33810 and the 33811. If the USB/SPI Dongle is not used, the 16 pin I/O port can be
connected to another microcomputer board or other external circuitry. The five outputs
are low side drivers, which will energize solenoids which are connected to VPWR. The
33811 will monitor the operation of the solenoids and indicate a fault if any of the
solenoids fail to pull-in. A detailed schematic is included on the accompanying CD.
5.1
LED Display
There are two LED’s, not shown in the block diagram, which indicate that VDD and
VPWR are present. VDD (5 volts) is provided by the 16 pin I/O connector (from the USB
port if the USB/SPI Dongle is used) and VPWR is provided externally through connector
X1.
5.2
16 Pin I/O Port Header Pin Definitions
The SPI Port and 9 parallel lines from the USB/SPI Dongle that control signals on the
33811 EVB are listed below. These signals are all available on the I/O Port Header (J1):
Pin Number
USB/SPI Dongle Name
Description
1
CS
SPI port Chip Select Bar
2
CNTL2
RESET signal for 33811
3
SO
SPI port Serial Output
4
CNTL1
Steers CS to 33811
5
SI
SPI port Serial Input
6
CNTL0 Steers
CS to 338110
7
SCLK
SPI port Serial Clock
8
DATA4
Input signal for OUTPUT5
9
CNTL3
OUTPUT_ENABLE for 33810
10
DATA3
Input signal for OUTPUT4
11
+5V
Supplies VDD to 33810, 33811
12
DATA2
Input signal for OUTPUT3
13
+3.3 V
Unused in 33811 EVB
14
DATA1
Input signal for OUTPUT2
15
GROUND
VSS for all circuits (GND)
16
DATA0
Input signal for OUTPUT1