ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 442

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
Software Use of CHKSM
This section outlines some ways CHKSM can be set up and used.
Test Mode Possible Patterns
In test mode, a 64-bit pattern is written/compared to/with memory. There are several different patterns that
can be used:
Constant Test Pattern
Ripple Pattern
with increment of 1
Ripple Pattern
with increment of 8
Ripple Pattern
with Ripple Limit
On-chip Checksum and DRAM Test Support (CHKSM)
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When in test mode, and the RP bit is cleared, the CHKSM Ripple Base Regis-
ter is replicated eight times to form a 64-bit pattern.
When in test mode and the RP bit is set and RP-ADD is set and CHKSM
Ripple Limit Register is set to ’0’, a 64-bit pattern is generated using the
CHKSM Ripple Base Register as a base. For example, if the CHKSM Ripple
Base Register is set to ’1’, the following pattern is generated:
…
When in test mode and the RP bit is set and RP-ADD is cleared and CHKSM
Ripple Limit Register is set to ’0’, a 64-bit pattern is generated using the
CHKSM Ripple Base Register as a base. For example, if the CHKSM Ripple
Base Register is set to ’1’, the following pattern is generated:
…
Each of the above ripple patterns can also make use of the CHKSM Ripple
Limit Register. By setting this register, the user can control when the ripple
pattern rolls over to zero. For example, when the CHKSM Ripple Limit Regis-
ter is set to three in increments by one mode the ripple pattern looks like:
…
Similarly, when the CHKSM Ripple Limit Register is set to ten, in incre-
ment-by-eight mode, the ripple pattern looks like:
…
pnr25.chapt05.01
August 14, 2000
Preliminary