Texas Instruments Multi-Cal-Slave Circuit Board MULTI-CAL-SLAVEKIT MULTI-CAL-SLAVEKIT Datenbogen
Produktcode
MULTI-CAL-SLAVEKIT
To
Sensor
Modules
To
Sensor
Modules
LED
Control
Control
Logic
Power
Switching
Power
Switching
Power
Switching
Jumpers
Slave Select
U34
Jumpers
and Decoder
U933
SPI
Mux
(XTR108)
Control
Power
Switching
One
Mux
Mux
(Four-Wire)
One to
V
Mux
OUT
Measure
V
Mux
OUT
Power ±15V
to +5V, 8V,
+10V, 10V
-
Multi-Cal-Slave
From Master or Slave Below
To Slave Above
Theory of Operation for Multi-Cal-Slave EVM Hardware
www.ti.com
2
Theory of Operation for Multi-Cal-Slave EVM Hardware
This section discusses the operation of the Multi-Cal-Slave EVM hardware.
2.1
Multi-Cal-Slave
shows the block diagram of the Multi-Cal-Slave. Note that most of the functional blocks on the
slave are direct copies from the master. There are several key differences:
•
The connections to the USB-DAQ (J101 and J102) are on not included on the slave (master only).
•
The power and DMM connection (J9) is not included on the slave (master only).
•
Slave boards have two ribbon cable connectors. One connector is on top of the board and one
connector is on the bottom. The master board only has one connecter. These connectors connect the
communications, signal, and power signals between the boards.
connector is on the bottom. The master board only has one connecter. These connectors connect the
communications, signal, and power signals between the boards.
•
The slave has jumpers and associated circuitry for decoding the slave board (U933). The master does
not have these jumpers.
not have these jumpers.
•
The slave has jumpers and associated circuitry for selecting the slave board (U34). The master does
not have these jumpers.
not have these jumpers.
Figure 2. Multi-Cal-Slave System Block Diagram
4
Multi-Cal-Slave Evaluation Module
SBOU094 – September 2010
Copyright © 2010, Texas Instruments Incorporated