Operation Principle And Function Circuit; Fig. 3-5. Block Diagram - L-Card ADC Series User Manual

3.4. Operation principle and function circuit

CONV_IN, START_IN
CONV_OUT, START_OUT
DI_SYN1, DI_SYN2
X1...X16, Y1...Y16, GND32
AGND, DGND
Цепи
Circuits are
изолированы
isolated
GND
Функционально
Functionally
близкая к L-502
close to the L-
часть
502 part of the
сбора/выдачи
data collection/
данных и
transmission and
обработки.
processing.
USB
Channel 3
Channel 3
SDRAM SDRAM
32 МБ
32 MB
Flash memory
Flash-память
2 МБ
2 MB
Интерфейсная часть.
Interface part.
E-502 operational scheme is nominally divided in two parts:
1. The part related to the collection/output of ADC/DAC data is digital I/O. This part
repeats the architecture of L-502. DAC and signal processor ADSP-BF523 presents
depends on the E-502 modification. The FPGA is focused on the logic of data collection
control, the ADC calibration logic, the secondary synchronization logic (
interface with the LPC4333 (LPC4337) ARM controller and the ADSP-BF523 signal
processor.
2. E-502 interface part on the basis on LPC4333 (LPC4337) ARM controller, with
USB and Ethernet support. Ethernet option depends on the E-502 modification.
All E-502 modifications have a LPC4333 (LPC4337) ARM controller and a galvanic isolation.
Подсистема
I/O sub-system
ввода-вывода
Комму-
Switch
татор
Узел гальвано-
Galvanic isolation
Cyclone IV
LED2
ARM
LPC4333/
4337
LED1
Только для E-502- - -D
Only for
Схема
E-502 primary
первичной
synchronization
ЦАП
DAC
синхронизаци
scheme
и E-502
Цифровой
Digital O/I
АЦП
в/в
ADC
гальваноразвязка всегда
there is always a galvanic
присутствует в E-502
развязки
node
Схема
ADC secondary
вторичной
synchronization
синхронизации
data scheme
данных АЦП
FPGA
Только в модификации с Ethernet
Only in the modification with Ethernet
RMII
Ethernet
PHY
Reset

Fig. 3-5. Block diagram

DAC1, DAC2
DO1...DO16
DI1...DI16
isolation in E-502
Только для E-502-P- -
Only for
Порты
O/I
в/в
ports
ADSP-
BF523
HOST
DMA
SDRAM
32 МБ
32 MB
Гальвано-
Ethernet
Ethernet
развязка
galvanic
Ethernet
isolation
Link
Activity
JTAG
3.3.5
), and the