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GFK-2059 Chapter 4 Theory of Operation 4-5
4
Figure 4-1: Digital-to-Analog Converter Board Functional Block Diagram
PROGRAM
CONTROL UPDATE
16-BIT
DAC
NO. 1
DAC
SEL
16-BIT
DAC
NO. 2
DAC
SEL
16-BIT
DAC
NO. 3
DAC
SEL
16-BIT
DAC
NO. 4
DAC
SEL
CH 1
CH 2
CH 3
CH 4
OPERATION
AND CONTROL
LOGIC
16-BIT
DAC
NO. 5
DAC
SEL
16-BIT
DAC
NO. 6
16-BIT
DAC
NO. 7
16-BIT
DAC
NO. 8
CH 5
CH 6
CH 7
CH 8
DAC
SEL
DAC
SEL
DAC
SEL
EXTERNAL
UPDATE
V
M
E
b
u
s
C
O
M
P
A
T
I
B
I
L
I
T
Y
L
O
G
I
C
ADDRESS
REGISTER
CSR
DATA BUS
AOUT AD
DR SELECT
4
8
8-CHANNEL
MUX
CH 8 CH 1
DUAL
SPDT
SWITCH
SELECT AIN
TEST
(
SAIT
)
SELECT A0
TEST
(
SA0T
)
A0 TEST
A0IN TEST
P2
A0 TEST
ANALOG
OUT
ISOLATION
SWITCHES
CH 1
CH 8
CH 1
CH 8
P3
TEST
MODE