Input/Output Pad Cell
Libraries
IO18lib and IO33lib
The Atmel Input/Output Cell Library, IO18lib, contains a comprehensive list of input, out-
put, bi-directional and tri-state cells. The ATC18M (1.8V) cell library includes one special
sets of I/O cells, IO25lib and IO33lib, for interfacing with external 3.3V devices.
They will encompass the following types of cells:
• Bi-directional
• Tri-state outport
• Outputs
• Inputs
• PCI
• PECL
• LVDS (EIA-644)
All buffers will be capable of being used as “Cold Sparing” Buffers.
Compiled Memories
Based on Virage Logic Memory Compilers, for synchronized memories. Its maximum
memory size compilation capability is:
SRAM
DPRAM
TPSF
16K x 32 bits
8K x 32 bits
1K x 16 bits
A set of EDAC can be used in combination with these memories so as to alleviate their
SEU susceptibility.
Synthesized Memory
The synthesis of memories is based on Atmel GENESYS within the GATEAID software.
It must be used only for small memories and when SEU hardened cells are needed.
The maximum memory sizes are as follows:
RAM
TPRAM
DPRAM
4K bits
4K bits
2K bits
4 ATC18M
4262A–AERO–07/03