3 power supply section, Table 4. power supply connections, Cdb5461au – Cirrus Logic CDB5461AU User Manual
Page 7
CDB5461AU
DS661DB1
7
1.2.3
Power Supply Section
Table 4 illustrates the power supply connections to the evaluation board. The +5 binding post (J3) supplies the pos-
itive analog (VA+) for the CS5461A and the +2.5V reference. The VD+_EXT binding post (J5) supplies the digital
section of the CS5461A (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 al-
lows 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+