Chapter 1
– 28 –
PCI-1721 User’s Manual
Advantech Co., Ltd.
www.advantech.com
Appendix B. Block Diagram
Appendix
B
L
o
c
al
B
u
s
12Bit
DA C 0
1K FIFO
Bidirectional
And Latched 8
Bits DIO
Auto Calibration Circuit
DIO[7:0]
U
/B
G
a
in
REF_V0
IOUT0
VOUT0
12Bit
DA C 1
U
/B
G
a
in
REF_V1
IOUT1
VOUT1
12Bit
DA C 2
U
/B
G
a
in
REF_V2
IOUT2
VOUT2
12Bit
DA C 3
U
/B
G
a
in
REF_V3
IOUT3
VOUT3
40M Hz
OSC.
FIFO
Controller
82C54
CNT0_CLK
CNT0_GATE
FIFO_CLK
EXT_GA TE
EXT_CLK
10M Hz
CLK Source
PLX9054
PCI Interface
DIO[15:8]
P
C
I
B
u
s
Bidirectional
And Latched 8
Bits DIO
CNT0_OUT
