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Connec-
Ter-
Exter-
tion cir-
minal
nal ter-
cuit
num-
minal
board
ber
name
DC I/O
K23
IOE0_X6
circuit
board
Differential
I/O circuit
board
Analog I/O
circuit
board
DC I/O
L24
IOE0_X7
circuit
board
Differential
I/O circuit
board
Analog I/O
circuit
board
DC I/O
J26
IOE0_X
circuit
OEL0
board
Differential
I/O circuit
board
Analog I/O
circuit
board
DC I/O
K26
IOE0_X
circuit
OEL1
board
Differential
I/O circuit
board
Analog I/O
circuit
board
DC I/O
L23
IOE0_Y0
circuit
board
Differential
I/O circuit
board
Analog I/O
circuit
board
DC I/O
L22
IOE0_Y1
circuit
board
Differential
I/O circuit
board
Analog I/O
circuit
board
APPX
668
Appendix 6 A List of FPGA External Terminals
Each
Func-
I/O di-
circuit
tions
rec-
board
tion
func-
tion ter-
minal
name
IOE0_X[6
DC input
Input
]
[6]
IOE0_DI4
Differential
22[6]
(RS-422)
input [6]
IOE0_AD
Serial read
_SCLK_B
back clock
IOE0_X[7
DC input
Input
]
[7]
IOE0_DI4
Differential
22[7]
(RS-422)
input [7]
IOE0_AD
ADC busy
_BUSY
input
(common
to 3 chips)
IOE0_XO
DC input
Input/
EL[0]
output
output
enable [0]
IOE0_DI
Differential
O485_EN
(RS-485) I/
O direction
IOE0_AD
ADC0
0_DOUT
serial data
A
input A
IOE0_XO
DC input
Input/
EL[1]
output
output
enable [1]
IOE0_DI
Differential
O485_I
(RS-485)
input
IOE0_AD
ADC0
0_DOUT
serial data
B
input B
IOE0_Y[0
DC output
Input/
]
[0]
output
IOE0_DO
Differential
422[0]
(RS-422)
output [0]
IOE0_AD
ADC2
2_DOUT
serial data
A
input A
IOE0_Y[1
DC output
Input/
]
[1]
output
IOE0_DO
Differential
422[1]
(RS-422)
output [1]
IOE0_AD
ADC2
2_DOUT
serial data
B
input B
I/O di-
I/O
I/O
Logic
rec-
type
volt-
tion
age
for
each
cir-
cuit
board
Input
3.3-V
3.3V
LVCM
OS
Input
3.3-V
3.3V
LVCM
OS
Positive
Output
3.3-V
3.3V
Negative
LVCM
OS
Positive/
negative
Input
Output
3.3-V
3.3V
Negative
LVCM
OS
Input
Output
3.3-V
3.3V
LVCM
OS
Input
Output
3.3-V
3.3V
LVCM
OS
Input
PU/
Initial state
Operating
PD in
frequency
Re-
After
FPGA
set-
reset
ting
re-
lease
PU
H
H
20MHz
4.17MHz
L
25MHz
PU
H
L
20MHz
4.17MHz
L
12.5MHz
PU
L
H
20MHz
L
Asynchronous
12.5MHz
PU
H
H
20MHz
L
10MHz
12.5MHz
PU
H
L
25MHz
H
4.17MHz
L
12.5MHz
PU
H
L
25MHz
H
4.17MHz
L
12.5MHz
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