CDB5467U Datasheet, PDF (6/38 Pages) Cirrus Logic – CDB5467U Engineering Board and GUI Software

CDB5467U
1.5 Power Supply Section
Table 4 illustrates the power supply connections to the evaluation board. The +5V binding post (J3) sup-
plies the positive analog (VA+) for the CS5467 and the +2.5V reference. The VD+_EXT binding post (J5)
supplies the digital section of the CS5467 (VD+) and level shifters. Jumper J8 allows the VD+ supply to
be sourced from the VD+_EXT binding post (J5), the +5V binding post (J3), or the regulated 3.3V supply
derived from the microcontroller. The Vu+_EXT (J6) binding post supplies the positive supply for the 8051
microcontroller (8051_REGIN). Jumper J9 allows the 8051_REGIN supply to be sourced from either the
Vu+_EXT binding post (J6), +5V binding post (J3) or VD+_EXT binding post (J5).
Power Supplies
Analog (VA+) Digital (VD+) 8051 (Vu+)
Power Post Connections
VD+
+5V
GND VD+EXT VU+EXT
J8
8051-REGIN
J9
NC
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
(Default)
Vu+_EXT
+5 O
VD+ O
O 8051
O 8051
O 8051
(Default)
NC
VD+_EXT O VD+ Vu+_EXT O 8051
+5
+5 O O VD+
+5 O O 8051
+3.3 O O VD+
VD+ O O 8051
+5
+5
+5
+5
0
NC
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT O 8051
+5 O O 8051
VD+ O O 8051
+5
NC
NC
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT O 8051
+5 O O 8051
VD+ O O 8051
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT
+5 O
VD+ O
O 8051
O 8051
O 8051
+5
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT
+5 O
VD+ O
O 8051
O 8051
O 8051
+5
+3.3
+5
+5
NC
NC
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT O 8051
+5 O O 8051
VD+ O O 8051
VD+_EXT O VD+ Vu+_EXT O 8051
+5
+5 O O VD+
+5 O O 8051
+3.3 O O VD+
VD+ O O 8051
0
+3.3
NC
VD+_EXT
+5 O
+3.3 O
O VD+
O VD+
O VD+
Vu+_EXT O 8051
+5 O O 8051
VD+ O O 8051
VD+_EXT O VD+ Vu+_EXT O 8051
+5
+5 O O VD+
+5 O O 8051
+3.3 O O VD+
VD+ O O 8051
Table 4. Power Supply Connections
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