Switching waveforms – Cypress CY7C0430BV User Manual
Page 20
CY7C0430BV
CY7C0430CV
Document #: 38-06027 Rev. *B
Page 20 of 37
Port 1 Write to Port 2 Read
[34, 35, 36]
Notes:
34. CE
0
= OE = LB = UB = CNTLD =V
IL
; CE
1
= CNTRST = MRST = MKLD = MKRD = CNTRD = CNTINC =V
IH
.
35. This timing is valid when one port is writing, and one or more of the three other ports is reading the same location at the same time. If t
CCS
is violated, indeterminate
data will be read out.
36. If t
CCS
< minimum specified value, then Port 2 will read the most recent data (written by Port 1) only (2*t
CYC2
+ t
CD2
) after the rising edge of Port 2’s clock. If
t
CCS
> minimum specified value, then Port 2 will read the most recent data (written by Port 1) (t
CYC2
+ t
CD2
) after the rising edge of Port 2’s clock.
Switching Waveforms
(continued)
t
SA
t
HA
t
SW
t
HW
t
CH2
t
CL2
t
CYC2
CLK
P1
R/W
P1
A
n
D
n
t
CKHZ
t
HD
t
SA
A
n
t
HA
Q
n
t
DC
t
CCS
t
SD
t
CKLZ
t
CH2
t
CL2
t
CYC2
t
CD2
PORT-1
ADDRESS
PORT-1
DATA
IN
CLK
P2
R/W
P2
PORT-2
ADDRESS
PORT-2
DATA
OUT