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Interface specification

• Contactless, passive RF interface using a proximity inductive coupling with a range in the

order of millimeters.

• Power to the transponder is coupled through the interface.

• The range depends on implementation (10 to 20 mm is the maximum). The best error rate

performance will occur at short distances.

• The memory can be read from below (by a drive) or from the front (in libraries).

• 32 kilobits (4 kilobytes)

• Organized as 128 x 32 byte blocks

• >500K write cycles, 20 year data retention life

• Write size is word wide (2 bytes) or block wide (32 bytes)

• The transfer-rate performance of the cartridge memory is as follows:

• Reads:

2 byte: ~20 Kb/s 32 byte: ~70 Kb/s 4 KB: ~0.5s

• Writes:

2 byte: ~1.4 Kb/s 32 byte: ~18.5 Kb/s 4 KB: ~1.8s

•

32 byte read: ~ 5.8 ms 32 byte write: ~ 15.8 ms

Further information

• For general information about LTO-CM, see “LTO Cartridge Memory” in Chapter 5,

“Cartridges” in Background to Ultrium Drives, Volume 6 of the Ultrium Technical Manual.

• For suggestions of how to make use of cartridge memory in libraries, see “LTO Cartridge

Memory (LTO-CM)” in Chapter 5, “Supporting Ultrium Features” in Software Integration,

Volume 2 of the Ultrium Technical Manual.

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