Hardware Configuration and Overview of Functions Hardware Specifications
4-4
Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
■CPU is a card whose software operates to control the entire ATM Switch, and
is composed of a 64-bit RISC processor, main memory, flash memory, etc.
Hardware Block Description of Functions
Switch/
CPU card ASW ■Cell switching control (point-to-point connection,
point-to-multipoint connection)
■Five-class cell delay priority control
■Cell alignment
■Back Pressure (BP) sampling cont rol/generation
control/multiplexing control
CLK ■System clock generation and distribution
■Self-running mode (self-running precision: +/- 4.6
ppm)
■Slave mode (pull-in range: +/- 9.2 ppm, only lines
00 - 13 can be enslaved)
GWPAD ■Cell assembly/disassembly control (transmission/
reception 512 connection)
■DMA transfer control (burst access)
CPU ■RISC processor installed
■Main memory 32 Mbytes
■Flash memory (PCMCIA card)
■LAN interface control (Ethernet) (PCMCIA c ard)
■SIO interface (RS-232C)
■Clock