Specifications

Installation and Operation Manual Chapter 4 Configuration
ASMi-52CQ Ver. 2.12 Memory Downloading 4-5
 Current margin, if line probing is set to adaptive
 Power spectral density (line probing set to fixed only)
 Line probing
 Transmission mode
 Loop attenuation threshold
 SNR margin threshold.
4.3 Memory Downloading
CPU and Memory Elements
Flash Memory
The ASMi-52CQ flash includes the following elements:
• Boot flash memory – Contains the Boot program, essential for the modems
initial operations.
• Flash memory – Contains the application program in a compressed state. The
boot program decompresses the application to the DRAM.
• DRAM – Contains the application while it runs, and all the data and variables
the program requires for operation.
• Peripherals – Include the SHDSL chipset, the LEDs and other on-board
components. The CPU can access these components.
• CPU – The main processing unit of the modem – responsible for all control,
monitoring and operation of the modem.
• FPGA – Responsible for glue logic and proprietary timing implementations.
The CPU first runs the Boot program from the Boot flash. The Boot program then
decompresses one of the two compressed application programs stored in the
Flash memory to the DRAM. The uncompressed program runs from the DRAM,
and loads the FPGA. This enables the CPU to access all the peripheral devices and
begin to run the modem.