at94k40al ATMEL Corporation, at94k40al Datasheet - Page 10

• Manufacturer Part Number: at94k40al
• Description: At94kal Series Field Programmable System Level Integrated Circuit
• Manufacturer: ATMEL Corporation

2.9
10
RAM
AT94KAL Series FPSLIC
Figure 2-5.
There are two types of RAM in the FPSLIC device: the FreeRAM distributed through the FPGA
Core and the SRAM shared by the AVR and FPGA. The SRAM is described in
Interface and System Control” on page
dispersed throughout the array and are connected in each sector as shown in
bit Input Data bus connects to four horizontal local buses (Plane 1) distributed over four sector
rows. A four-bit Output Data bus connects to four horizontal local buses (Plane 2) distributed
over four sector rows. A five-bit Input-address bus connects to five vertical express buses in the
same sector column (column 3). A five-bit Output-address bus connects to five vertical express
buses in the same column. WAddr (Write Address) and RAddr (Read Address) alternate posi-
Synthesis Mode
Arithmetic Mode
DSP/Multiplier Mode
Counter Mode
Tri-State/Mux Mode
Some Single Cell Modes
CARRY IN
C
D
A
B
A
B
C
EN
A
B
C
D
A
B
C
21. The 32 x 4 dual-ported FPGA FreeRAM blocks are
D Q
D Q
D Q
D Q
Q (Registered)
and/or
PRODUCT
and/or
Q
SUM
or
SUM (Registered)
CARRY
PRODUCT (Registered)
or
and/or
CARRY
and/or
CARRY
Q
Q
Figure
1138I–FPSLI–1/08
“FPGA/AVR
2-6. A four-