CYNSE10128-083FGCI CYPRESS [Cypress Semiconductor], CYNSE10128-083FGCI Datasheet - Page 70

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

Document #: 38-02069 Rev. *F
HLAT = 001 (binary), TLSZ = 01 (binary), LRAM = 1 (binary), LDEV = 1 (binary).
Note: |(LHI_0[6:0]) and &(LHI_1_L[6:0]) stands for the boolean ‘OR’ and ‘AND’ respectively of the entire LHI bus.
Note: Each bit in LHO_0[1:0] and LHO_1_L[1:0] is the same logical signal.
“Gray Area”
= the last device
is driving the bus
to a known state.
• When more than one device is cascaded, the last device is always the default driver of the SRAM interface signals, i.e., when
• Referring to Figure 6-17, the last device drives the SRAM interface signals until the end of cycle #5. From cycle #6 onwards,
M = 25 for CYNSE10512, 24 for CYNSE10256, 23 for CYNSE10128
none of the devices is driving, the last device will set the SRAM interface signals to a known default state. When other devices
are driving, the last device will set its I/Os on the SRAM interface to High-Z.
its I/Os are three-stated to allow other devices to drive the SRAM interface signals, except when it’s its turn to drive. This goes
on until the end of cycle #10, and at the beginning of cycle #11, it drives the SRAM interface to a known default state again
when no other devices are driving.
&(LHI_1_L[6:0])
LHO_1_L[1:0]
|(LHI_0[6:0])
LHO_0[1:0]
SADR[
CMD[10:2]
CMD[1:0]
CLK2X
PHS_L
ALE_L
CMDV
WE_L
OE_L
CE_L
SSV
SSF
M
DQ
Figure 6-17. Timing Diagram for 72-bit MultiSearch Device Number 7 (Last Device)
:0]
0
0
0
1
0
0
0
0
1
0
0
cycle
M-Search1 M-Search3
A B A B A B A B
1
A
10
B
cycle
CONFIDENTIAL
M-Search2 M-Search4
2
C
PRELIMINARY
10
D
cycle
3
E
10
1
F
cycle
4
G
Miss on
this device
10
0
H
M-Search5
cycle
5
A B
I
10
1
J
cycle
1
6
1
1
Local
winner but
not global
winner
z
z
z
z
z
z
cycle
7
Addr
0
0
D
0
0
1
z
cycle
8
Global
winner
z
1
z
z
0
z
1
1
cycle
Addr
9
G
0
0
1
1
z
z
Miss on
this device
cycle
10
1
z
1
z
z
z
z
z
CYNSE10512
CYNSE10256
CYNSE10128
Local but not
global winner
0
0
0
1
0
0
0
1
0
0
Global
winner
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