LFXP3C-5TN100C Lattice, LFXP3C-5TN100C Datasheet - Page 221
LFXP3C-5TN100C
Manufacturer Part Number
LFXP3C-5TN100C
Description
FPGA - Field Programmable Gate Array 3.1K LUTS 62 I/O
Manufacturer
Lattice
Specifications of LFXP3C-5TN100C
Number Of Programmable I/os
62
Data Ram Size
55296
Supply Voltage (max)
3.465 V
Maximum Operating Temperature
+ 90 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Supply Voltage (min)
1.71 V
Package / Case
TQFP-100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LFXP3C-5TN100C
Manufacturer:
Lattice Semiconductor Corporation
Quantity:
10 000
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Figure 10-2. DQ-DQS During READ
Figure 10-3. DQ-DQS During WRITE
Implementing DDR Memory Interfaces with the LatticeECP/EC Devices
This section describes how to implement the read and write sections of a DDR memory interface. It also provides
details of the DQ and DQS grouping rules associated with the LatticeECP/EC and LatticeXP devices.
DQS Grouping
Each DQS group generally consists of at least 10 I/Os (1DQS, 8DQ and 1DM) to implement a complete 8-bit DDR
memory interface. In the LatticeECP/EC devices each DQS signal will span across 16 I/Os and in the LatticeXP
devices the DQS will span 14 I/Os. Any 10 of these 16 I/Os can be used to implement an 8-bit DDR memory inter-
face. In addition to the DQS grouping, the user must also assign one reference voltage VREF1 for a given I/O bank.
The tables below show the total number of DQS groups available per I/O bank for each device and package.
(at PIN)
(at PIN)
DQS
DQ
(at REG)
(at REG)
(at PIN)
(at PIN)
DQS
DQS
DQ
DQ
Preamble
REG and 90
DQS PIN to
Phase Shift
Degree
10-2
Postamble
LatticeECP/EC and LatticeXP
DDR Usage Guide
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