Trenz Electronic TE0300, Руководство пользователя, Страница: 11 / 26

Spartan-3E FPGA Industrial Micromodule User Manual
Signal FPGA pin FPGA ball
24MHZ1
IO_L12P_2
(bank 2)
N9
Table 14: 24 MHz clock signal details.
Main Clock Oscillator
The module has a main SMD clock oscillat-
or providing a clock source for the FPGA as
detailed in Table 15.
Signal FPGA pin FPGA ball
100MHZ
125MHZ GCLK0
(bank 2)
U10
Table 15: main clock signal details.
Standard frequencies are 100 MHz and 125
MHz (please visit Trenz Electronic website
for current ordering information). The
lower the main clock frequency, the lower
the module power consumption. Moreover,
as the main clock is preferably used as
DDR SDRAM clock, a lower clock frequency
makes easier for the development tools to
meet the timing requirements (particularly
for DDR SDRAM). For customized boards,
this clock can be changed according to
user requirements.
Interface Clock (IFCLK)
The IFCLK line synchronizes the commu-
nication between the USB microcontroller
and bank3 of the FPGA as detailed in Table
16.
Signal FPGA pin FPGA ball
IFCLK
LHCLK5
(bank 3)
K4
Table 16: interface clock signal details
(bank 3).
Digital Clock Manager (DCM)
The DCMs of the FPGA can be used to syn-
thesize arbitrary clock frequencies from
any on-board clock network, differential
clock input pair or single-ended clock in-
put. For further reference, please read Xil-
inx data sheet DS485 "Digital Clock Man-
ager (DCM) Module" (dcm_module.pdf)
and Xilinx application note XAPP462 "Using
Digital Clock Managers (DCMs) in Spartan-
3 FPGAs" (xapp462.pdf).
On-board Memories
The TE0300 has three on-board memories:
■
DDR SDRAM
■
SPI Flash
■
serial EEPROM
DDR SDRAM
TE0300 modules have a 512Mb DDR
SDRAM component for operation (code and
data) accessible through the FPGA.
Commercial-grade modules mount the fol-
lowing component:
Micron Technology MT46V32M16BN-6
Industrial-grade modules mount the fol-
lowing component:
Micron Technology MT46V32M16BN-6 IT
You can get the exact part number of the
component mounted on your module from
the Micron FBGA decoder:
http://www.micron.com/support/part_info
/fbga/decoder
When developing DDR SDRAM designs
with Xilinx tools (e.g. MIG, MPMC, ...), you
should select the following product type:
MT46V32M16-6.
Should it be not available, you can use one
of the following product types:
■
MT46V32M16-5
■
MT46V32M16XX-5B
■
MT46V32M16BN-5B
■
MT46V32M16FN-5B
■
MT46V32M16P-5B
■
MT46V32M16TG-5B
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