CYNSE70128-83BGC Cypress Semiconductor Corp, CYNSE70128-83BGC Datasheet - Page 104

• Manufacturer Part Number: CYNSE70128-83BGC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYNSE70128-83BGC

• Operating Supply Voltage (min): 1.425V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: BGA
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

11.3
Bit[0] of each of the 72-bit entries is designated as a special bit (1 = occupied; 0 = empty). For each Learn or PIO Write to the
data array, each device asserts FULO[1] and FULO[0] if it does not have any empty locations within it (see Figure 11-3). Each
device combines the FULO signals from the devices above it with its own full status to generate a FULL signal that gives the full
status of the table up to the device asserting the FULL signal. Figure 11-3 shows the hardware connection diagram for generating
the FULL signal that goes back to the ASIC. In a depth-cascaded block of up to eight devices, the FULL signal from the last device
should be fed back to the ASIC controller to indicate the fullness of the table. The FULL signal of the other devices should be left
open.
in tables containing more than eight devices. In tables for which a Learn instruction is not going to be used, the bit[0] of each 72-
bit entry should always be set to 1.
Document #: 38-02040 Rev. *F
Note
Depth-Cascading for a FULL Signal
. The Learn instruction is supported for only up to eight devices, whereas FULL cascading is allowed only for one block
SSF, SSV
DQ[71:0]
CMD[10:0], CMDV
Figure 11-2. Depth-Cascading Four Blocks
Block of 8
Block of 7
Block of 8
Block of 8
BHO[2]
BHO[2]
BHI[2]
BHO[2]
BHO[2]
BHI[2]
BHI[2]
BHI[2]
CYNSE70128s
CYNSE70128s
CYNSE70128s
CYNSE70128s
BHO[1]
BHO[1]
BHI[1]
BHO[1]
Block 2 (devices 16–23)
BHO[1]
Block 3 (devices 24-30)
Block 1 (devices 8–15)
BHI[1]
BHI[1]
BHI[1]
Block 0 (devices 0–7)
BHO[0]
BHO[0]
BHO[0]
BHO[0]
BHI[0]
BHI[0] GND
BHI[0]
BHI[0] GND
GND
SRAM
CYNSE70128
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