5 power supply section, Cdb5464u, Table 4 – Cirrus Logic CDB5464U User Manual
Page 6
CDB5464U
6
DS847DB1
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 CS5464 and the +2.5V reference. The VD+_EXT binding post (J5)
supplies the digital section of the CS5464 (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
Power Post Connections
VD+
8051-REGIN
Analog (VA+) Digital (VD+) 8051 (Vu+)
+5V
GND
VD+EXT VU+EXT
J8
J9
+5
+5
+5
+5
0
NC
NC
+5
NC
+5
NC
+5
NC
+5
+3.3
+5
+5
0
NC
NC
+5
+3.3
NC
+5
Table 4. Power Supply Connections
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
(Default)
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
(Default)
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+
O
VD+
O O
VD+
O O
VD+
VD+_EXT
+5
+3.3
O
8051
O O
8051
O O
8051
Vu+_EXT
+5
VD+