PM5364 pmc-sierra, PM5364 Datasheet - Page 208
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PM5364
Manufacturer Part Number
PM5364
Description
Tupp 2488 Assp Telecom Standard
Manufacturer
pmc-sierra
Datasheet
1.PM5364.pdf
(306 pages)
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PM5364-BI
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
Port Transfer Mode Writing
In port transfer mode the microprocessor updates only one configuration entry within a word of
offline connection memory page. The procedure operates in a Read-Update-Write fashion. First
the existing configuration is read and internally stored. Then a port mapping is changed and
written back to the connection memory page by writing to the Access Mode register. The steps
to perform a port transfer are shown in the following example:
Example: If you want to change the cross bar to map the input data bus DIN[7][13:0] to the
output data bus DOUT[6][13:0] for just the 1025
Steps:
1. CPU writes 0x0E6 to the Port Selection register (i.e. PORTCFG[3:0]=0x07,
2. CPU writes 0x4400 to the Access Mode register (i.e., RWB=’1’, ACCESS_MODE=’0’,
3. Wait 4 REFCLK cycles. Polling the BUSY bit in the Access Mode register provides a
4. CPU writes 0x400 to the Access Mode register (i.e. RWB=’0’, ACCESS_MODE=’0’,
5. Wait 4 REFCLK cycles before returning to step 1 to perform another mapping change.
Word Transfer Mode Writing
In word transfer mode, the microprocessor updates an entire word of offline connection memory
page. The steps to perform a word transfer are shown in the following example:
Example: If you want to change the entire cross bar mapping from DIN to DOUT for the 1025
column of the frame.
Steps:
1. CPU writes new mapping to the Configuration 3-0 Input Port register.
2. CPU writes new mapping to the Configuration 7-4 Input Port register.
3. CPU writes new mapping to the Configuration 11-8 Input Port register.
4. CPU writes new mapping to the Configuration 15-11 Input Port register.
PORTADDR[3:0]=0x06).
WORDADDR[10:0]=0x400). This triggers a read from the offline memory connection page
at location 0x400.
platform independent way of ensuring this condition is satisfied. The BUSY bit will remain
high while the read is in progress.
WORDADDR[10:0]=0x400). This triggers a write to the offline connection memory page
at location 0x400 with the updated port configuration.
Again the BUSY bit can be used to ensure this condition is satisfied.
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
th
column of the frame.
Released
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208
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