
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATMTraffic Management Device
Released
Datasheet
98
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
Address
Long
Address
Name
Read or
Write
Description
0
h
0
h
REVISION
R
Contains the device part number and revision.
4
h
1
h
RESET
R/W
Resets the device, except the microprocessor interface.
8
h
2
h
TEST_CONFIG
R/W
Define various test/diagnostic functions.
C
h
3
h
SRAM_CONFIG
R/W
Defines the SRAM configuration.
10
h
4
h
SWITCH_CONFIG
R/W
Defines the type of switch fabric.
14
h
5
h
RAM BIST RESULT
R/W
RAM BIST completion result
14
h
-18
h
5
h
-6
h
Not used
R/W
Set to 0 for software compatibility with future devices.
1C
h
7
h
MARKED_CELLS_COUNT
R
Indicates the number of cells modulo (mod) 16 that had
Tag(9,1) set to 1, sent to or from the switch fabric.
20
h
8
h
CONDITION_PRES_BITS
R
Defines the condition of present bits.
24
h
9
h
CONDITION_LATCH_BITS
R
Defines the condition of latch bits.
28
h
A
h
INTR_MASK
R/W
Defines the interrupt mask bits.
2C
h
-3C
h
B
h
-F
h
Reserved
R/W
Do not initialize.
40
h
10
h
UTOPIA_CONFIG
R/W
Defines the mode of the UTOPIA interface.
44
h
11
h
UT_PRIORITY
R/W
Indicates the priority of each virtual input/output.
48
h
12
h
UT_ENABLE
R/W
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.
4C
h
13
h
TX_UT_STAT
R
Indicates the transmit UTOPIA status.
50
h
14
h
TX_UT_WD_ALIVE
R/W
Indicates the transmit UTOPIA watchdog liveness.
54
h
-7F
h
15
h
-1F
h
Not used
R
Driven with a 0. Mask on reads to maintain compatibil-
ity with future versions.
80
h
20
h
RX_CELL_START_ALIGN
R/W
Contains alignment value for the internal RxCellStart
signal from the external RX_CELL_START.