LFE2M50E-5FN900C LATTICE SEMICONDUCTOR, LFE2M50E-5FN900C Datasheet - Page 41
LFE2M50E-5FN900C
Manufacturer Part Number
LFE2M50E-5FN900C
Description
IC, LATTICEECP2M FPGA, 420MHZ, FPBGA-900
Manufacturer
LATTICE SEMICONDUCTOR
Series
LatticeECP2Mr
Datasheet
1.LFE2-12E-5FN256C.pdf
(385 pages)
Specifications of LFE2M50E-5FN900C
No. Of Logic Blocks
48000
No. Of Macrocells
24000
No. Of Speed Grades
5
No. Of I/o's
410
Clock Management
DLL, PLL
I/o Supply Voltage
3.465V
Total Ram Bits
4147Kbit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LFE2M50E-5FN900C
Manufacturer:
Lattice Semiconductor Corporation
Quantity:
10 000
- Current page: 41 of 385
- Download datasheet (3Mb)
Lattice Semiconductor
Figure 2-36. DQS Local Bus
Polarity Control Logic
In a typical DDR Memory interface design, the phase relationship between the incoming delayed DQS strobe and
the internal system clock (during the READ cycle) is unknown.
The LatticeECP2/M family contains dedicated circuits to transfer data between these domains. To prevent set-up
and hold violations, at the domain transfer between DQS (delayed) and the system clock, a clock polarity selector
is used. This changes the edge on which the data is registered in the synchronizing registers in the input register
block. This requires evaluation at the start of each READ cycle for the correct clock polarity.
Prior to the READ operation in DDR memories, DQS is in tristate (pulled by termination). The DDR memory device
drives DQS low at the start of the preamble state. A dedicated circuit detects the first DQS rising edge after the pre-
amble state. This signal is used to control the polarity of the clock to the synchronizing registers.
*DQSXFERDEL shifts ECLK1 by 90% and is not associated with a particular PIO.
DQSXFER
DQS
DQS
DCNTL[6:0]
ECLK1
DQSXFER
DCNTL[6:0]
CLK1
GSR
DQS
CEI
2-38
DQSXFERDEL*
Polarity Control
DQSDEL
Logic
PIO
PIO
To DDR
Register Block
Register Block
Reg.
Output
Input
Calibration bus
To Sync
LatticeECP2/M Family Data Sheet
from DLL
Reg.
Buffer
Buffer
sysIO
sysIO
DI
DI
Strobe
Datain
DDR
DQS
PAD
PAD
Architecture
Related parts for LFE2M50E-5FN900C
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC, LATTICEECP2M FPGA, 420MHZ, FPBGA-484
Manufacturer:
LATTICE SEMICONDUCTOR
Datasheet:
Part Number:
Description:
FPGA LatticeECP2M Family 48000 Cells 90nm (CMOS) Technology 1.2V 672-Pin FBGA
Manufacturer:
LATTICE SEMICONDUCTOR
Datasheet:
Part Number:
Description:
FPGA LatticeECP2M Family 48000 Cells 90nm (CMOS) Technology 1.2V 484-Pin FBGA
Manufacturer:
LATTICE SEMICONDUCTOR
Datasheet:
Part Number:
Description:
Programmable Logic IC Development Tools LatticeECP2M PCI Express Dev Kit
Manufacturer:
Lattice
Datasheet:
Part Number:
Description:
ISPLSI2032-80LT44Lattice Semiconductor [In-System Programmable High Density PLD]
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
IC PROGRAMMED LATTICE GAL 16V8
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
Lattice Semiconductor Corp.
Datasheet: