- 您現在的位置：買賣IC網 > PDF目錄379696 > ATT3020-70M68I (Electronic Theatre Controls, Inc.) Field-Programmable Gate Arrays PDF資料下載
參數資料
| 型號： | ATT3020-70M68I |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | FPGA |
| 英文描述： | Field-Programmable Gate Arrays |
| 中文描述： | 現場可編程門陣列 |
| 文件頁數： | 21/80頁 |
| 文件大小： | 528K |
| 代理商： | ATT3020-70M68I |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁
Lucent Technologies Inc.
21
Data Sheet
February 1997
ATT3000 Series Field-Programmable Gate Arrays
Configuration
(continued)
The specific data format for each device is produced by
the bit stream generation program, and one or more of
these files can then be combined and appended to a
length count preamble and be transformed into a
PROM format file by the PROM generation program of
the
ORCA
Foundry Development System. The tie
option of the bit stream generation program defines
output levels of unused blocks of a design and con-
nects these to unused routing resources. This prevents
indeterminate levels which might produce parasitic
supply currents. This tie option can be omitted for quick
breadboard iterations where a few additional mA of I
CC
are acceptable.
The configuration bit stream begins with high preamble
bits, a 4-bit preamble code, and a 24-bit length count.
When configuration is initiated, a counter in the FPGA
is set to 0 and begins to count the total number of con-
figuration clock cycles applied to the device. As each
configuration data frame is supplied to the FPGA, it is
internally assembled into a data word. As each data
word is completely assembled, it is loaded in parallel
into one word of the internal configuration memory
array. The configuration loading process is complete
when the current length count equals the loaded length
count and the required configuration program data
frames have been written. Internal user flip-flops are
held reset during configuration.
Two user-programmable pins are defined in the uncon-
figured FPGA: high during configuration (HDC) and low
during configuration (
LDC
), and DONE/
PROG
may be
used as external control signals during configuration. In
master mode configurations, it is convenient to use
LDC
as an active-low EPROM chip enable. After the last
configuration data bit is loaded and the length count
compares, the user I/O pins become active. Options in
the bit stream generation program allow timing choices
of one clock earlier or later for the timing of the end of
the internal logic reset and the assertion of the DONE
signal. The open-drain DONE/
PROG
output can be
AND-tied with multiple FPGAs and used as an active-
high READY, an active-low PROM enable, or a RESET
to other portions of the system. The state diagram of
Figure 18 illustrates the configuration process.
相關PDF資料 |
PDF描述 |
|---|---|
| ATT3020-70M84I | Field-Programmable Gate Arrays |
| ATT3020-70S132I | Field-Programmable Gate Arrays |
| ATT3020-70S44I | Field-Programmable Gate Arrays |
| ATT3020-70S68I | Field-Programmable Gate Arrays |
| ATT3030-125M44I | Field-Programmable Gate Arrays |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ATT3020-70M84 | 制造商:AT&T 功能描述: 制造商:ATandT 功能描述: |
| ATT3020-70M84I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Gate Arrays |
| ATT3020-70N100 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
| ATT3020-70N100M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
| ATT3020-70R84M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field Programmable Gate Array (FPGA) |
發布緊急采購，3分鐘左右您將得到回復。