Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
7 MICROPROCESSOR PORTS
7.1 Microprocessor Ports Summary
NOTES:
•
•
The external /RESET signal resets all microprocessor write ports to 0 when asserted.
All ports marked as “Reserved” must be initialized to 0 (unless otherwise indicated) at initial setup.
Software modifications to these locations after setup may cause incorrect operation.
•
•
All read/write port bits marked “Not used” must be written with the value 0 to maintain software com-
patibility with future versions.
Most read-only bits marked “Not used” are driven with a 0; however, some may have an unpredictable
value on reads. Therefore, all read-only bits marked “Not used” should be masked by the software on
reads to maintain compatibility with future versions.
Table 23. Microprocessor Ports Summary
Byte
Long
Read or
Write
Name
Description
Address Address
0h
4h
0h
1h
REVISION
RESET
R
Contains the device part number and revision.
Resets the device, except the microprocessor interface.
Define various test/diagnostic functions.
Defines the SRAM configuration.
R/W
R/W
R/W
R/W
R/W
R/W
R
8h
2h
TEST_CONFIG
Ch
3h
SRAM_CONFIG
SWITCH_CONFIG
RAM BIST RESULT
Not used
10h
14h
14h-18h
1Ch
4h
Defines the type of switch fabric.
5h
RAM BIST completion result
5h-6h
7h
Set to 0 for software compatibility with future devices.
MARKED_CELLS_COUNT
Indicates the number of cells modulo (mod) 16 that had
Tag(9,1) set to 1, sent to or from the switch fabric.
20h
24h
8h
9h
CONDITION_PRES_BITS
CONDITION_LATCH_BITS
INTR_MASK
R
Defines the condition of present bits.
Defines the condition of latch bits.
Defines the interrupt mask bits.
R
28h
Ah
R/W
R/W
R/W
R/W
R/W
2Ch-3Ch
40h
Bh-Fh
10h
11h
12h
Reserved
Do not initialize.
UTOPIA_CONFIG
UT_PRIORITY
Defines the mode of the UTOPIA interface.
Indicates the priority of each virtual input/output.
44h
48h
UT_ENABLE
Enables whether the polling results from the PHY layer
device will be considered during the UTOPIA PHY
selection mechanism. Also sets the number of devices
to be polled when standard polling is used.
4Ch
50h
13h
14h
TX_UT_STAT
R
R/W
R
Indicates the transmit UTOPIA status.
TX_UT_WD_ALIVE
Indicates the transmit UTOPIA watchdog liveness.
54h-7Fh
15h-1Fh Not used
Driven with a 0. Mask on reads to maintain compatibil-
ity with future versions.
80h
20h RX_CELL_START_ALIGN
R/W
Contains alignment value for the internal RxCellStart
signal from the external RX_CELL_START.
98
PMC [ PMC-SIERRA, INC ]
