System description
ADwin
4
ADwin-Gold
USB / ENET, manual version 3.8, October 2005
2.2 The
ADwin-Gold
System
Processor and memory
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).
Analog inputs
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
.
Fig. 2 – Block diagram of the
ADwin-Gold
Analog outputs
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.
Digital inputs and outputs
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.
Trigger input (EVENT)
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).
8 Bit
8 Bit
A/CLK, B/DIR, CLR/LATCH
four 32 bit counter
16bit / 5µs
16bit / 5µs
14bit / 0,5µs
14bit / 0,5µs
A
D
A
D
A
D
A
D
MUX
MUX
IN 1
IN 3
IN 5
IN 7
IN 9
IN 11
IN 13
IN 15
IN 2
IN 4
IN 6
IN 8
IN 10
IN 12
IN 14
IN 16
D
A
SHARC
™
ADSP 2106x
from Analog Devices
with 16 or 64 MB
external DRAM
D
A
16bit
16bit
OUT 1
OUT 2
32 digital I/Os,
programmable
as in- or output
8
I/O
8
I/O
8
I/O
8
I/O
CONN. 1
(D
IG
ITA
L
IN
)
CONN. 2
(D
IG
IT
AL
OUT
)
EVENT
PGA
G = 1, 2, 4, 8
+
-
PGA
G = 1, 2, 4, 8
+
-
D
A
16bit
OUT 8
. . . .
.
. . . .
.
OP
+
-
OP
+
-
OP
+
-
. . . .
.
8 Bit
8 Bit
CONN. 3
(CNT
R IN,
di
ff
ere
n
tial
)
to PC
USB-/
ENET-
controller
Note: shaded components are optional.
