參數(shù)資料
型號(hào)： XC4013E-1BG225C
廠商： Xilinx Inc
文件頁(yè)數(shù)： 41/68頁(yè)
文件大小： 0K
描述： IC FPGA C-TEMP 5V 1SPD 225-PBGA
產(chǎn)品變化通告： Product Discontinuation 28/Jul/2010
標(biāo)準(zhǔn)包裝： 1
系列： XC4000E/X
LAB/CLB數(shù)： 576
邏輯元件/單元數(shù)： 1368
RAM 位總計(jì)： 18432
輸入/輸出數(shù)： 192
門(mén)數(shù)： 13000
電源電壓： 4.75 V ~ 5.25 V
安裝類(lèi)型： 表面貼裝
工作溫度： 0°C ~ 85°C
封裝/外殼： 225-BBGA
供應(yīng)商設(shè)備封裝： 225-PBGA
R
XC4000E and XC4000X Series Field Programmable Gate Arrays
6-50
May 14, 1999 (Version 1.6)
used), and if RAM is present, the RAM content must be
unchanged.
Statistically, one error out of 2048 might go undetected.
Conguration Sequence
There are four major steps in the XC4000 Series power-up
conguration sequence.
Conguration Memory Clear
Initialization
Conguration
Start-Up
The full process is illustrated in Figure 46.
Conguration Memory Clear
When power is rst applied or is reapplied to an FPGA, an
internal circuit forces initialization of the conguration logic.
When Vcc reaches an operational level, and the circuit
passes the write and read test of a sample pair of congu-
ration bits, a time delay is started. This time delay is nomi-
nally 16 ms, and up to 10% longer in the low-voltage
devices. The delay is four times as long when in Master
Modes (M0 Low), to allow ample time for all slaves to reach
a stable Vcc. When all INIT pins are tied together, as rec-
ommended, the longest delay takes precedence. There-
fore, devices with different time delays can easily be mixed
and matched in a daisy chain.
This delay is applied only on power-up. It is not applied
when re-conguring an FPGA by pulsing the PROGRAM
pin
0
X2
2 3456789 10 11 12 13 14
1
X15
X16
15
SERIAL DATA IN
1 0 1514 13 12 1110 9 8 7 65
1
CRC – CHECKSUM
LAST DATA FRAME
START
BIT
X1789
Polynomial: X16 + X15 + X2 + 1
Readback Data Stream
Figure 45: Circuit for Generating CRC-16
INIT
High? if
Master
Sample
Mode Lines
Load One
Configuration
Data Frame
Frame
Error
Pass
Configuration
Data to DOUT
VCC
>3.5 V
No
Yes
No
Yes
Operational
Start-Up
Sequence
No
Yes
~1.3
s per Frame
Master Waits 50 to 250
s
Before Sampling Mode Lines
Master CCLK
Goes Active
F
Pull INIT Low
and Stop
X6076
EXTEST*
SAMPLE/PRELOAD
BYPASS
CONFIGURE*
(* if PROGRAM = High)
SAMPLE/PRELOAD
BYPASS
EXTEST
SAMPLE PRELOAD
BYPASS
USER 1
USER 2
CONFIGURE
READBACK
If Boundary Scan
is Selected
Config-
uration
memory
Full
CCLK
Count Equals
Length
Count
Completely Clear
Configuration Memory
Once More
LDC
Output
=
L,
HDC
Output
=
H
Boundary Scan
Instructions
Available:
I/O
Active
Keep Clearing
Configuration Memory
Test M0 Generate
One Time-Out Pulse
of 16 or 64 ms
PROGRAM
= Low
No
Yes
Figure 46: Power-up Conguration Sequence
Product Obsolete or Under Obsolescence
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