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PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATMTraffic Management Device
Released
Datasheet
150
8
INTERNAL RAM MEMORY MAP
8.1
The internal RAM contains the following RAM regions:
Transmit Service Class RAM (TSC_RAM) 2560
×
16
Receive Service Class RAM (RSC_RAM) 388
×
16
Virtual Output Control RAM (VO_RAM) 256
×
16
Receive Switch Fabric Control RAM (RSF_CONTROL_RAM) 40
×
32
Transmit Switch Fabric Control RAM (TSF_CONTROL_RAM) 12
×
28
Receive UTOPIA RAM (RU_RAM) 64
×
32 (4 cell buffers)
Transmit UTOPIA RAM (TU_RAM) 48
×
32 (3 cell buffers)
Receive Switch Element RAM (RS_RAM) 128
×
32 (8 cell buffers)
Transmit Switch Element RAM (TS_RAM) 192
×
32 (12 cell buffers)
Queue Engine Registers.
Table 25. Internal RAM Summary
Internal RAM Summary
Byte Address
Long Address
Name
Description
400000-
4027FC
h
440000-44060C
h
100000-1009FF
h
Transmit Service Class RAM
(TSC_RAM)
Contains the transmit SC queue control block.
110000-110183
h
Receive Service Class RAM
(RSC_RAM)
Contains the receive SC RAM.
480000-
4803FC
h
4C0000-
4C00A0
h
120000-1200FF
h
Virtual Output Control RAM
(VO_RAM)
Contains the control tables for the VOs and the direction
control.
130000-130028
h
Receive Switch Fabric Con-
trol RAM
(RSF_CONTROL_RAM)
Contains the control table for cell buffers in transmission at
the receive switch fabric interfaces.
500000-50002C
h
140000-14000B
h
Transmit Switch Fabric Con-
trol RAM
(TSF_CONTROL_RAM)
Contains the control table for cell buffers in transmission at
the transmit switch fabric interfaces.
540000-
5400FC
h
580000-5800C0
h
150000-15003F
h
Test Access to the Receive
UTOPIA RAM (RU_RAM)
Contains the cell buffers for cells headed from the UTOPIA
interface.
160000-160030
h
Test Access to the Transmit
UTOPIA RAM (TU_RAM)
Contains the cell buffers for cells headed toward the UTO-
PIA interface.
5C0000-
5C01FC
h
170000-17007F
h
Test Access to the Receive
Switch Element RAM
(RS_RAM)
Contains the cell buffers for cells headed toward the switch
fabric.
600000-
6002FC
h
180000-1800BF
h
Test Access to the Transmit
Switch Element RAM
(TS_RAM)
Contains the cell buffers for cells coming from the switch
fabric.
7C0000-
7C004C
h
1F0000-1F0013
h
Queue Engine Registers
For information, refer to sections
“QUEUE ENGINE
CONDITION_PRES_BITS” on page 132
,
“RX_DIR_STATE (Internal Structure)” on page 140
,
“TX_DIR_CONFIG” on page 141
, and
“TX_DIR_STATE
(Internal Structure)” on page 141
.