CYNSE10128-083FGCI CYPRESS [Cypress Semiconductor], CYNSE10128-083FGCI Datasheet - Page 57

• Manufacturer Part Number: CYNSE10128-083FGCI
• Manufacturer: CYPRESS [Cypress Semiconductor]

TLSZ = 01 (binary), LRAM = 1 (binary), LDEV = 1 (binary) for this particular example.
The following is the sequence of operation for a single Search command (also refer to Subsection 6.2, “Command Bus Param-
eters,” on page 50).
Document #: 38-02069 Rev. *F
HLAT = 001 (binary), TLSZ = 00 (binary), LRAM = 1 (binary), LDEV = 1 (binary).
M = 25 for CYNSE10512, 24 for CYNSE10256, 23 for CYNSE10128
• Cycle A:
— Command Bus: The host ASIC drives CMDV HIGH and applies Search command CMD[1:0] = “10”. The CMD[2] and
— DQ Bus: At the same time in cycle A, DQ[71:0] must be driven with the 72-bit data to be compared.
CMD[9] signals must be driven to logic 0 for the 72-bit search, but for 144-bit search, CMD[9] = 1 and CMD [2] = 0. For
288-bit search, CMD[9] is don’t care, whereas CMD[2] = 1 for the first “A” cycle and 0 for the last “A” cycle.
{CMD[10],CMD[5:3]} signals must be driven with the index to the GMR pair for use in this Search operation. CMD[8:6]
signals must be driven with the same bits that will be driven on SADR[25:23] for CYNSE10512, SADR[24:22] for
CYNSE10256, SADR[23:21] for CYNSE10128 if it has a hit.
CMD[10:2]
SADR[
CMD[1:0]
CMD[2]
ALE_L
CLK2X
PHS_L
WE_L
CMDV
OE_L
CE_L
SSV
SSF
DQ
M
:0]
Logic 0 for A-cycles
Figure 6-5. Timing Diagram for Mixed Single Search (One Device)
for x72 and x144
1
1
1
0
0
0
cycle
Search1
A B A B A B A B
1
D1
10
X Y1Y2 Z1 Z2Z3 Z4
CMPR[2] on B-cycles
cycle
1st x288 A-cycle
CONFIDENTIAL
Search2
PRELIMINARY
2
D2
Logic 1 on the
10
cycle
3
Search3
D3
cycle
10
4
cycle
the last A-cycle
Addr
5
X
Logic 0 on
cycle
0
0
Search1 Search2
×72 Hit ×144 Hit
6
Addr
Y
cycle
1
7
cycle
Addr
8
0
1
1
Z
Search3
×288 Hit
cycle
9
1
cycle
10
1
1
0
CYNSE10512
CYNSE10256
CYNSE10128
Page 57 of 153
[+] Feedback
[+] Feedback