CDB5378
J19
Voltage Reference Jumpers
VREF-
VREF+
4
2
----------
----------
3
1
J10
VA- Voltage Selection
J11
VA+ Voltage Selection
-2.5VA
GND
1
3
5
----------
2
4
6
+2.5VA
+5VA
1
3
5
----------
2
4
6
*
*
*
*
*
*
*
*
EXT_VA-
EXT_VA+
J12
VD Input Voltage Source
J13
VCORE Input Voltage Source
EXT_VA+
EXT_VD
1
3
*
*
2
4
EXT_VA+
EXT_VD
1
3
*
*
2
4
----------
----------
J22
VD Voltage Selection
J21
VCORE Voltage Selection
+3.3VD
1
3
----------
2
4
+3.3VD
+2.5VD
EXT_VD
1
3
5
----------
2
4
6
EXT_VD
*
*
*
*
*
*
Table 3. VREF, Power Supplies Default Jumper Settings
J16, J17, J18
J5
Digital Filter, CPLD,
Microcontroller
Input Clock Selections
Clock Input TERM
50 Ohms
2
*
*
1
32.768 MHz
16.384 MHz
8.192 MHz
4.096 MHz
2.048 MHz
1
3
5
7
9
----------
2
4
*
*
*
*
*
*
*
*
*
*
*
*
*
*
6
8
10
12
14
16
1.024 MHz 11
CLK_EXT 13
15
Table 4. Clock Default Jumper Settings
DS639DB3
7
CIRRUS [ CIRRUS LOGIC ]
