Switching Waveforms (continued)
Read Programmable Registers
tCLKH
tCLK
RCLK
LD
tENS
WEN
tENS
Q0 –Q17
tCLKL
tENH
tA
UNKNOWN
PAE OFFSET
Write Expansion Out Timing
tCLKH
WCLK
WXO
WEN
Note 30
tXO
Note 29
tXO
tENS
Read Expansion Out Timing
tCLKH
WCLK
Note 30
tXO
RXO
REN
tXO
tENS
Write Expansion In Timing
tXI
WXI
tXIS
WCLK
Notes:
29. Write to Last Physical Location.
30. Read from Last Physical Location.
CY7C4255V/CY7C4265V
CY7C4275V/CY7C4285V
PAF OFFSET
PAE OFFSET
4275V–20
4275V–21
4275V–22
4275V–23
Document #: 38-06012 Rev. **
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