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System description
Processor and memory
Analog inputs
Analog outputs
Digital inputs and outputs
Trigger input (EVENT)
4
2.2 The ADwin-Gold System
The ADwin-Gold system is equipped with the digital 32 bit signal processor
T9 (SHARC ADSP 21062) from Analog Devices with floating point and integer
processing. It is responsible for the complete measurement data acquisition,
online processing, and signal output, and makes it possible to process instan-
taneously sample rates of up to several 100 kHz.
The on-chip memory with 256 kB has a very short access time of 25 ns and
is large enough to hold the complete ADwin operating system, the ADbasic
processes and all variables.
In order to get maximum access times, all inputs and outputs are memory-
mapped in the external memory section of the DSP. For buffering larger quan-
tities of data the DSP uses an external memory of 16 MB (DRAM; optional
64 MB).
The system has 16 analog inputs with BNC plugs (alternatively: DSub con-
nectors), which are divided into two groups each being connected to one mul-
tiplexer. These two outputs are optionally converted by a 14-bit or 16-bit ana-
log-to-digital converter (ADC), (see Fig. 2 "Block diagram of the ADwin-Gold).
With the 14-bit ADCs it is possible to sample very fast, with the 16-bit ADCs
highly accurately.
IN 1
MUX
IN 3
IN 5
PGA
IN 7
+
IN 9
-
IN 11
G = 1, 2, 4, 8
IN 13
IN 15
IN 2
MUX
IN 4
IN 6
PGA
IN 8
+
IN 10
-
IN 12
G = 1, 2, 4, 8
IN 14
IN 16
EVENT
8 Bit
8 Bit
A/CLK, B/DIR, CLR/LATCH
Fig. 2 – Block diagram of the ADwin-Gold
The standard version of the ADwin-Gold system is equipped with 2 analog
outputs (optional 8) with an output voltage range of -10V ... +10V and a 16-
bit resolution. You can synchronize the output of the voltage of all DACs per
software.
32 digital inputs or outputs are available on two 25-pin D-Sub connectors.
They can be programmed in groups of 8 as inputs or outputs. The inputs or out-
puts are TTL-compatible.
The ADwin-Gold has a trigger input (EVENT, see also chapter 5.2 "Digital
Inputs and Outputs"). Processes can be triggered by a signal and are com-
pletely processed afterwards. (see ADbasic manual, chapter "Structure of the
ADbasic Program").
All analog data inputs and outputs of the system are differential.
The connection between ADwin-Gold system and computer is made via the
USB or Ethernet interface (depending on the version you have purchased).
USB-/
ENET-
controller
16bit / 5µs
A
D
14bit / 0,5µs
A
SHARC™
D
ADSP 2106x
16bit / 5µs
from Analog Devices
A
with 16 or 64 MB
external DRAM
D
14bit / 0,5µs
A
D
8
I/O
32 digital I/Os,
programmable
as in- or output
8
I/O
four 32 bit counter
ADwin-Gold USB / ENET, manual version 3.8, October 2005
ADwin
to PC
16bit
OP
D
+
OUT 1
A
-
16bit
OP
D
+
OUT 2
A
-
16bit
OP
D
+
OUT 8
A
-
8
8 Bit
I/O
8
8 Bit
I/O
Note: shaded components are optional.
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