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CDB5466U
1.2.3
Power Supply Section
Table 7 illustrates the power supply connections to the evaluation board. The +5 binding post (J3) supplies the pos-
itive analog supply (VA+) for the CS5466 and the +2.5 V reference. The VD+_EXT binding post (J5) supplies the
digital section of the CS5466 (VD+) and level shifters. Jumper J8 allows the VD+ supply to be sourced from the
VD+_EXT binding post (J5), the +5 V binding post (J3), or the regulated +3.3 V supply derived from the microcon-
troller. The Vu+_EXT (J6) binding post supplies the positive supply for the 8051 processor (8051_REGIN). Jumper
J9 allows the 8051_REGIN supply to be sourced from either the Vu+_EXT binding post (J6), +5 V binding post (J3)
or VD+_EXT binding post (J5).
Power Supplies
Power Post Connections
VD+
8051-REGIN
Analog (VA+) Digital (VD+) 8051 (Vu+)
+5V
GND
VD+EXT VU+EXT
J8
J9
NC
VD+_EXT
+5 O
+3.3 O
O
O
O
VD+
VD+
VD+
Vu+_EXT
+5
VD+
O
O
O
O
O
8051
8051
8051
(Default)
(Default)
+5
+5
+5
+5
0
NC
+5
NC
NC
VD+_EXT
+5 O
+3.3 O
VD+_EXT
+5 O
+3.3 O
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
Vu+_EXT
+5
VD+
Vu+_EXT
+5
VD+
Vu+_EXT
+5
VD+
O
O
O
O
O
O
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
+5
VD+_EXT
O VD+
Vu+_EXT
O
8051
+5 O
+3.3 O
O VD+
O VD+
+5
VD+
O
O
O
O
8051
8051
+5
NC
NC
VD+_EXT
+5 O
+3.3 O
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
Vu+_EXT
+5
VD+
Vu+_EXT
+5
VD+
O
O
O
O
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
NC
+5
+3.3
+5
+5
0
+5
NC
VD+_EXT
+5 O
+3.3 O
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
O VD+
O VD+
O VD+
Vu+_EXT
+5
VD+
Vu+_EXT
+5
VD+
O
O
O
O
O 8051
O 8051
O 8051
O 8051
O 8051
O 8051
+3.3
+5
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT
+5
VD+
O
O
O 8051
O 8051
O 8051
Table 7. Power Supply Connections
8
DS676DB1
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