Memory Map

Minimum stack size should be 2048 bytes, minimum heap size should be at least 2048 bytes.

All other memories (buffers, etc.) are user-defined and application specific and may be allocated statically or dynamically.

The net.lib library uses two special code sections:

.nettextfast
.nettextslow

Performance critical functions are located in .nettextfast and should be mapped to fastest memory in the linker command file. .nettextslow can be linked to slower memory without noticeable performance penalties.

Example linker command file:

Refer to Example Linker Command File

Code and Data Size

Required Code and Data size depends on used protocols and sockets:

CCS3.3, netlib rev. 2.54

Code Size:
    Adapter + MAC + PHY              24512 bytes
    ARP                               4032 bytes
    Sockets                          14016 bytes
    IP                                2624 bytes
    ICMP                              2272 bytes
    UDP                               3488 bytes
    TCP                              15456 bytes
    DNS                               2560 bytes
    DHCP                              4800 bytes


Stack Size:                          2048 bytes
Heap Size:
    Adapter/PHY                       228 bytes
    per UDP/ICMP Socket               496 bytes
    per TCP Socket                    604 bytes

Static RAM:
    ARP Cache                        2444 bytes
    TCP sequence number cache        4646 bytes