Owner manual

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+