CY7C43643-10AC Cypress Semiconductor Corp, CY7C43643-10AC Datasheet - Page 11

• Manufacturer Part Number: CY7C43643-10AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C43643-10AC

• Density: 32Kb
• Word Size: 36b
• Sync/async: Synchronous
• Expandable: Yes
• Package Type: TQFP
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06021 Rev. *B
Table 2. Flag Programming
Table 3. Port A Enable Function
Table 4. Port B Enable Function
Table 5. FIFO Flag Operation (CY Standard and FWFT Modes)
Number of Words in FIFO Memory
0
1 TO X1
(X1+1) to [1024–(Y1+1)] (X1+1) to [4096–(Y1+1)] (X1+1) to [16384–(Y1+1)]
(1024–Y1) to 1023
1024
Notes:
3.
4.
5.
6.
7.
CSA
CSB
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X register holds the offset for AE; Y register holds the offset for AF.
X is the Almost Empty offset for FIFO used by AE. Y is the Almost Full offset for FIFO used by AF. Both X and Y are selected during a FIFO reset or port A
programming.
When a word loaded to an empty FIFO is shifted to the output register, its previous FIFO memory location is free.
Data in the output register does not count as a “word in FIFO memory”. Since in FWFT Mode, the first word written to an empty FIFO goes unrequested to the
output register (no read operation necessary), it is not included in the FIFO memory count.
The OR and IR functions are active during FWFT mode; the EF and FF functions are active in CY Standard Mode.
SPM
CY7C43643
H
H
H
H
L
L
L
L
W/RA
W/RB
X
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
FS1/SEN
H
H
H
H
L
L
L
L
ENB
ENA
(4096–Y1) to 4095
4096
H
H
H
H
X
H
H
H
H
X
L
L
L
L
L
L
[2]
0
1 TO X1
CY7C43663
MBA
MBB
FS0/SD
X
X
H
H
H
X
X
H
H
H
L
L
L
L
L
L
[4, 5, 6, 7]
H
H
H
H
L
L
L
L
CLKB
CLKA
X
X
X
X
X
X
X
X
0
1 TO X1
(16384–Y1) to 16383
16384
MRS1/MRS2
In high-impedance state
In high-impedance state
In high-impedance state
In high-impedance state
Active, Mail2 register
Active, Mail2 register
Active, Mail2 register
Active, Mail2 register
In high-impedance state
In high-impedance state
In high-impedance state
In high-impedance state
Active, FIFO output register
Active, FIFO output register
Active, Mail1 register
Active, Mail1 register
CY7C43683
A
B
[2]
0–35
0–35
Outputs
Outputs
64
16
8
Parallel programming via Port A
Serial programming via SD
Reserved
Reserved
Reserved
Synchronized to CLKB Synchronized to CLKA
EF/OR
H
H
H
H
L
X and Y Registers
None
None
FIFO write
Mail1 write
None
None
None
Mail2 read (set MBF2 HIGH)
None
None
None
Mail2 write
None
FIFO read
None
Mail1 read (set MBF1 HIGH)
AE
H
H
H
L
L
Port Function
Port Function
AF
CY7C43643
CY7C43663
CY7C43683
H
H
H
L
L
[3]
Page 11 of 29
FF/IR
H
H
H
H
L
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