AT40K20-2BGC Atmel, AT40K20-2BGC Datasheet - Page 6
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AT40K20-2BGC
Manufacturer Part Number
AT40K20-2BGC
Description
IC FPGA 20K GATES 352BGA
Manufacturer
Atmel
Series
AT40K/KLVr
Specifications of AT40K20-2BGC
Number Of Logic Elements/cells
1024
Total Ram Bits
8192
Number Of I /o
289
Number Of Gates
30000
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Operating Temperature
0°C ~ 70°C
Package / Case
352-LBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Labs/clbs
-
Other names
AT40K202BGC
The Busing Network
6
AT40K/AT40KLV Series FPGA
Figure 3 on page 7 depicts one of five identical busing planes. Each plane has three bus
resources: a local-bus resource (the middle bus) and two express-bus (both sides)
resources. Bus resources are connected via repeaters. Each repeater has connections
to two adjacent local-bus segments and two express-bus segments. Each local-bus
segment spans four cells and connects to consecutive repeaters. Each express-bus
segment spans eight cells and “leapfrogs” or bypasses a repeater. Repeaters regener-
ate signals and can connect any bus to any other bus (all pathways are legal) on the
same plane. Although not shown, a local bus can bypass a repeater via a programma-
ble pass gate allowing long on-chip tri-state buses to be created. Local/Local turns are
implemented through pass gates in the cell-bus interface. Express/Express turns are
implemented through separate pass gates distributed throughout the array.
Some of the bus resources on the AT40K/AT40KLV are used as a dual-function
resources. Table 2 shows which buses are used in a dual-function mode and which bus
plane is used. The AT40K/AT40KLV software tools are designed to accommodate dual-
function buses in an efficient manner.
Table 2. Dual-function Buses
Function
Cell Output Enable
RAM Output Enable
RAM Write Enable
RAM Address
RAM Data In
RAM Data Out
Clocking
Set/Reset
Type
Local
Express
Express
Local
Local
Express
Express
Express
Plane(s)
1 - 5
5
2
1
1
2
4
5
Direction
Horizontal
and Vertical
Vertical
Vertical
Vertical
Horizontal
Horizontal
Vertical
Vertical
Comments
Bus full length at array edge
Bus in first column to left of
RAM block
Bus full length at array edge
Bus in first column to left of
RAM block
Buses full length at array edge
Buses in second column to left
of RAM block
Data In connects to local
bus plane 1
Data out connects to local
bus plane 2
Bus half length at array edge
Bus half length at array edge
0896C–FPGA–04/02