DATA SHEET
PMC-970113
ISSUE 3
PM3351 ELAN 1X100
SINGLE PORT FAST ETHERNET SWITCH
PROGRAMMER'S MODEL................................................................................ 157
Local Memory ............................................................................................ 158
Register Map.............................................................................................. 158
General-Purpose Registers .................................................................. 158
Special-Purpose Registers ................................................................... 158
Control Registers .................................................................................. 159
Register Descriptions ................................................................................. 163
CPU Special Registers ......................................................................... 163
Device Control Registers ...................................................................... 164
RPCIM Functional Block (PCI access DMA channel) ................................ 173
DEBUG Functional Block........................................................................... 182
DPI Functional Block (DMA transmit channel) ........................................... 187
TX_FIFO functional block: ................................................................................. 191
Major components of the TX_FIFO datapath ....................................... 191
TX_FIFO interrupts to Switch Processor .............................................. 192
Disposition of Frames:.......................................................................... 192
DPO funtional block (DMA transfer handshake channel)........................... 199
HASH functional block ............................................................................... 215
Interrupts to Swtich Processor ................................................................... 226
GPI (Switch Processor General Purpose Inputs)....................................... 230
GPO (Switch Processor General Purpose Outputs) .................................. 231
Coprocessor Test Conditions..................................................................... 235
OPERATION...................................................................................................... 237
Power Supply Sequencing ......................................................................... 237
MECHANICAL INFORMATION ......................................................................... 238
ORDERING AND THERMAL INFORMATION ................................................... 240
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE iv