CONFIDENTIAL
PRELIMINARY
CYNSE10512
CYNSE10256
CYNSE10128
Document #: 38-02069 Rev. *F
Page 37 of 153
5.4.14
Block Mini-Key Register (BMR)
The BMR is only accessible when the device is in the Enhanced mode. There is one BMR for each block in the device. The
following table (Table 5-16) shows the BMR fields.
Table 5-16. Block Mini-Key Register Description
Field
Range
(decimal)
Initial Value
(binary)
Description
NES
[1:0]
0
NSE Entry Size. This field selects the entry width for the associated block. A
Search operation that is of different size than the NES will cause the block to not
participate in the search.
The NES encoding is as follows:
00: 72-bit
01: 144-bit
10: 288-bit
11: 576-bit
For proper free-entry address computation, this NES field must be set before
initializing the entries in a block. The entries of a block must then be initialized to
a known value before accessing the block.
[31:2]
Reserved.
Mini-Key3
[39:32]
0
Mini-Key #3. There are four Mini-Key fields in each BMR. When an operation
occurs, all four fields are checked against the Mini-Key in the selected CPR by the
command. If there is a match, the associated block is enabled to participate in the
operation.
Mini-Key2
[47:40]
0
Mini-Key #2. See Mini-Key #3 description.
Mini-Key1
[55:48]
0
Mini-Key #1. See Mini-Key #3 description.
Mini-Key0
[63:56]
0
Mini-Key #0. See Mini-Key #3 description.
[71:64]
Reserved.
7
15
23
0
39
47
55
31
63
71
Mini-Key3
Mini-Key2
Mini-Key1
Mini-Key0
Figure 5-22. Block Mini-Key Register
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