L-Card ADC Series, Руководство пользователя

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Flash-memory with a capacity of 2 MB is designed for storing FPGA firmware, calibration
factors, factory serial number. Half the amount of Flash memory is provided for user tasks.
The E-502 I/O subsystem (in part 1.) contains nodes for the channel switch, ADC, DAC, digital
I/O, as well as the primary synchronization circuit (
3.3.5
).
A galvanic isolation node isolated all circuits of the I/O subsystem from circuits electrically
connected with any other circuits.
Signal processor ADSP-BF523 with SDRAM 32 MB is designed for additional data processing
and management within user tasks. If the processor is enabled, the entire data stream and the I/O
subsystem are transferred through the processor's I/O ports. For example, it is possible to create a
control loop through a signal processor using all the capabilities of E-502 data collection and delivery.
Independent processor and data transfer Interface is performed through the HOST DMA processor
port to the ARM-controller. The processor has a JTAG connector on the board.
ARM controller LPC4333 (LPC4337) has its independent SDRAM 32 MB and hidden Reset
button, located on the E-502 front panel. The test of this SDRAM is always done after the power
is turned on (the error is indicated by LED2,
s. 2.3.2, p. 14
).
Processors LPC4333, LPC4337 are identical, in terms of their resources involved, and the
option of bundling does not affect the consumer properties of the product
1
. ("L-Card"
The manufacturer reserves the right to optionally complete the E-502 module either with the
LPC4333 or LPC4337 processor without any distinctive product marking and without corresponding
differences in product passports.
A short press of the Reset button makes a normal reset of the ARM controller.
A long press (more than 10 s) of the Reset button (
s. 2.4, p. 14
) shifts the E-502 to a special
"loader" mode via USB. A special mode is needed to update the E-502 firmware and change the
Ethernet IP address.
After power supply is applied to the E-502, the firmware will be downloaded to the FPGA from
the Flash memory (
fig. 3-5
), and the E-502 internal power supply system will be fully turned on, after
which the E-502 will be ready for normal operation.
E-502 switches to work with USB or Ethernet after turning on the power automatically on the
interface from which the first access to the E-502 will take place. Parallel operation from both
interfaces is not supported.
1
"L-Card" reserves the right to optionally equip the E-502 module with either the LPC4333 or LPC4337 processor without any
distinctive product marking and without corresponding differences in product passports