User Manual

1.1.3 What is the 64-bit hardware unique serial number?
The 7524/2A/27 equips a 64-bit hardware unique hardware serial number
onboard. This number is unique & cannot be shared by any three 7524/2A/27.
The application software can check this number for illegal copies. It is the most
low cost protection mechanism the 7524/2A/27 currently has
1.1.4 What is the Self-Tuner ASIC?
The 2-wire RS-485 port is designed to directly drive the 7000 series
modules. It is a half-duplex 2-wire RS-485 network. Send/receive directional
control in a 2-wire RS-485 network is very important. Therefore, The 7521
series equip a Self-Tuner ASIC controller for all RS-485 ports. The Self-Tuner
ASIC controller will auto detect & control the send/receive direction of the RS-
485 network. Consequently, the application program does not have to worry
about the send/receive directional control of the RS-485 network.
1.1.5 What is the I/O Expansion Bus?
The 7521 all support I/O expansion buses. The I/O expansion bus can be used to
implement various I/O functions such as D/I, D/O, A/D, D/A, Timer/Counter, UART,
flash memory, battery backup SRAM, AsicKey & other I/O functions. Nearly all kinds of
I/O functions can be implemented on this bus.
1.1.6 What is the AsicKey?
The I/O expansion bus supports AsicKey. The AsicKey equips a complex
machine for validation checking. Included in this is 128 bytes of private data
for the same purpose. It provides very strong protection against illegal copies.
Every legal user has a unique AsicKey & unique software library, the user can
self check this key, or the software library will check the key automatically. In
this main, it is nearly impossible to remove the AsicKey protection.
7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----9