SPI Flash
1-8
ADSP-CM403F EZ-KIT Lite Evaluation System Manual
SPI Flash
The EZ-KIT Lite ships with an internal 4 MB SPI flash, connected via the
SPI2 interface, which is used for booting and scratchpad space. Refer to
the
ADSP-CM40x Mixed-Signal Control Processor Hardware Reference
for
more information about the internal SPI flash.
For more information, refer to the SPI flash example in the POST, which
is included in the ADSP-CM40x Enablement Software.
Analog Interface
The ADSP-CM403F processor provides two 16-bit ADCs with 12 inputs
each,
ADC0
and
ADC1
. The ADC signals are connected to the Analog expan-
sion connector (
J9
). There are also two 12-bit DACs available on
J9
.
Refer to
ADSP-CM403F EZ-KIT Lite Schematic
for more information.
Voltage reference for the ADC channels can be supplied internally from
the processor or externally by ADR441 ICs.
U6
is the
VREF0
supply exter-
nal source, and
U2
is its
VREF1
equivalent. To select the external source for
either supply, place a jumper on
JP1
or
JP2
. Refer to
A buffered version of the voltage reference is available on
J9
via a unity
gain buffer ADA4889 (
U22
). By default, the internal
VREF0
source is
selected as the input to the buffer (
JP3
positions 1 and 2). If the external
voltage reference is desired, change the jumper to
JP3
positions 2 and 3.
Voltage references for the analog inputs are configurable; refer to
for more information.
