LFE2M20E-5F256I LATTICE SEMICONDUCTOR, LFE2M20E-5F256I Datasheet - Page 39

• Manufacturer Part Number: LFE2M20E-5F256I
• Description: FPGA LatticeECP2M Family 19000 Cells 90nm (CMOS) Technology 1.2V 256-Pin FBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFE2M20E-5F256I

• Package: 256FBGA
• Family Name: LatticeECP2M
• Device Logic Units: 19000
• Typical Operating Supply Voltage: 1.2 V
• Maximum Number Of User I/os: 140
• Ram Bits: 1246208
• In System Programmability: Yes

Lattice Semiconductor
Top Edge
The PICs on the top edge are different from PIOs on the left, right and bottom edges. PIOs on this edge do not
have DDR registers or DQS signals.
The exact DQS pins are shown in a dual function in the Logic Signal Connections table in this data sheet. Addi-
tional detail is provided in the Signal Descriptions table. The DQS signal from the bus is used to strobe the DDR
data from the memory into input register blocks. Interfaces on the left and right edges are designed for DDR mem-
ories that support 16 bits of data, whereas interfaces on the bottom are designed for memories that support 18 bits
of data.
Figure 2-33. DQS Input Routing for the Left and Right Edges of the Device
DQS
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
PIO A
PIO B
2-36
sysIO
Buffer
Delay
LatticeECP2/M Family Data Sheet
PADA "T"
PADA "T"
PADA "T"
PADA "T"
PADA "T"
PADA "T"
PADB "C"
PADB "C"
PADA "T"
PADB "C"
PADB "C"
PADB "C"
PADB "C"
PADB "C"
DQS Pin
PADA "T"
PADB "C"
Assigned
LVDS Pair
LVDS Pair
LVDS Pair
LVDS Pair
LVDS Pair
LVDS Pair
LVDS Pair
LVDS Pair
Architecture