Power Supply
Technical Summary, Rev. 3
Freescale Semiconductor
2-15
2.11 Power Supply
The main power input, +12.0V DC/AC, to the 56858EVM is through a 2.1mm coax power jack.
An op5.0V DC power supply input is available through a 2-pin terminal block, TB1. A
+12.0V DC 1.2A power supply is provided with the 56858EVM; however, less than 500mA is
required by the EVM. The remaining current is available for user daughter card applications
when connected to the daughter card interface. The power regulation on the 56858EVM provides
+5.0V DC voltage regulation for the codec’s analog circuits and to the additonal voltage
regulation logic on the EVM. The additonal voltage regulation logic pr1.8V DC voltage
regulation for the controller’s core and +3.3V DC voltage regulation for the controller’s I/O,
memory, parallel JTAG interface and supporting logic; refer to
Figure 2-10
. Power applied to the
56858EVM is indicated with a Power-On LED, referenced as LED7.
+5.0V DC
Analog
+12.0V DC
Power
Condition
CODEC
56858
+3.3V
Regulator
TB1
P2
+5.0V DC
GND
+1.8V
Regulator
56858EVM
PARTS
56858
CORE
+3.3V DC
+1.8V DC
+5.0V
Regulator
Figure 2-10. Schematic Diagram of the Power Supply
Содержание 56858
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