UEi PowerDAQ PDXI-AO Series, User Manual

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Chapter 3: Architecture
20
Architecture
This chapter describes the functional operation of the PowerDAQ
AO boards.
Figure 4: Block Diagram of the PowerDAQ PD2-AO boards
Functional Overview
Although there are some functional differences between the
PD2-AO and PDXI-AO boards they all utilize the same
PowerDAQ software, which significantly simplifies the
software development process.
Configur ation
& Calibr ation
EEPROM
DAC1
DAC0
DAC2 9
DAC28
DAC3
DAC2
DAC31
DAC3 0
Volt age
Reference
AOut Calibrat ion
DACs
A
n
a
lo
g
O
u
tp
u
t
A
m
p
lif
ie
rs
E
xt
er
n
a
l A
n
a
lo
g
O
u
tp
u
t
C
on
n
ec
to
r
(J
1
)
IRQA
AOUT0
AOUT0 SENSE
AOUT1
AOUT3 1
AOUT3 0
AOUT1 SENSE
AOUT3 1 SENSE
AOUT3 0 SENSE
IRQB
IRQC
DIn Contr ol
DOut Control
Clock
Out
3
3
(8 )
In
te
rn
a
l D
ig
it
a
l I
/
O
C
on
n
e
c
to
r
J
2
(8 )
Local Data Bus
A
d
d
re
ss
AOut Cont rol
Bus Master PCI Int er face
Motorola 66MHz DSP 56301
E
S
S
I
A
O
u
t
FI
FO
A
O
u
t
C
lo
c
k
6
C
h
a
n
n
el
D
M
A
1
2
k
P
ro
g
ra
m
R
A
M
1
2
k
D
a
ta
R
A
M
B
o
o
ts
tr
a
p
R
O
M
U
se
r
C
lo
ck
U
se
r
C
lo
ck
C
o
n
tr
o
l
A
d
d
re
ss
D
a
ta
32 Bit PCI Bus
User
Count er
Timer
3 x24 - bit
Digit al
Input
Buffer
Latch
Interrupt
Digital
Out put
(Driver)