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
Power Post Connections
VD+
J8
8051-REGIN
J9
+5V
GND
VD+EXT VU+EXT
Analog (VA+) Digital (VD+) 8051 (Vu+)
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
O
O
8051
NC
+3.3
VD+
8051
(Default)
(Default)
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
NC
+5
NC
NC
O
O
8051
+3.3
VD+
8051
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
O
O
8051
+3.3
VD+
8051
+5
+5
+5
+5
0
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
O
O
8051
+3.3
VD+
8051
+5
NC
NC
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O
O
O
8051
8051
8051
+3.3
VD+
+5
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O
O
O
8051
8051
8051
+3.3
VD+
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O
O
O
8051
8051
8051
NC
+5
+3.3
VD+
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
O
O
8051
+3.3
VD+
8051
+5
+3.3
+5
+5
0
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O
O
O
8051
8051
8051
NC
+5
+3.3
VD+
+3.3
ꢁ
O
O
ꢁ
O
O
VD+_EXT
+5
Vu+_EXT
+5
O
O
O
VD+
VD+
VD+
O 8051
O
O
8051
+3.3
VD+
8051
Table 4. Power Supply Connections
6
DS714DB1
CIRRUS [ CIRRUS LOGIC ]
