LFE2-6E-7T144C Lattice, LFE2-6E-7T144C Datasheet - Page 32

• Manufacturer Part Number: LFE2-6E-7T144C
• Description: FPGA - Field Programmable Gate Array 6K LUTs 90 I/O DSP 1.2V -7
• Manufacturer: Lattice

Specifications of LFE2-6E-7T144C

• Number Of I/os: 90
• Maximum Operating Frequency: 420 MHz
• Operating Supply Voltage: 1.2 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-144
• Minimum Operating Temperature: 0 C
• Factory Pack Quantity: 300

Lattice Semiconductor
These two data streams are synchronized with the system clock before entering the core. Further discussion on
this topic is in the DDR Memory section of this data sheet.
By combining input blocks of the complementary PIOs and sharing some registers from output blocks, a gearbox
function can be implemented, that takes a double data rate signal applied to PIOA and converts it as four data
streams, IPOS0A, IPOS1A, IPOS0B and IPOS1B. Figure 2-26 shows the diagram using this gearbox function. For
more information on this topic, please see information regarding additional documentation at the end of this data
sheet.
The signal DDRCLKPOL controls the polarity of the clock used in the synchronization registers. It ensures ade-
quate timing when data is transferred from the DQS to system clock domain. For further discussion on this topic,
see the DDR Memory section of this data sheet.
Figure 2-26. Input Register Block for Left, Right and Bottom Edges
CLK0 (of PIO B)
CLK0 (of PIO A)
DDRCLKPOL
DDRCLKPOL
(From sysIO
(From sysIO
Routing
Routing
DEL [3:0]
From
From
Buffer)
Buffer)
DEL [3:0]
Delayed
Delayed
DI
DI
DQS
DQS
CLKA
CLKB
*Shared with output register
**Selected PIO.
True PIO in LVDS I/O Pair
Comp PIO in LVDS I/O Pair
Dynamic Delay
Dynamic Delay
Fixed Delay
Fixed Delay
0
1
0
1
0
1
0
1
DDR Registers
DDR Registers
D
D
D
D
D-Type
D-Type
D-Type
D-Type
Q
Q
Q
Q
D1
D1
0
1
D
D
D-Type
DDRSRC
D-Type
D0
0
1
Q
Q
2-29
Gearbox Configuration Bit
D2
D0
D2
0
1
0
1
SDR & Sync
SDR & Sync
Registers
Registers
D
D
D
D
/LATCH
/LATCH
/LATCH
/LATCH
D-Type
D-Type
D-Type
D-Type
Q
Q
Q
Q
LatticeECP2 Family Data Sheet
Note: Simplified version does not
show CE and SET/RESET details
Clock Transfer Registers
Clock Transfer Registers
D
D
D
D
D-Type*
D-Type*
D-Type*
D-Type*
Q
Q
Q
Q
INCK**
To DQS Delay Block**
INDD
IPOS0A
QPOS0A
IPOS1A
QPOS1A
INCK**
To DQS Delay Block**
INDD
IPOS0B
QPOS0B
IPOS1B
QPOS1B
Architecture
Routing
Routing
To
To