CY7C1392CV18, CY7C1992CV18
CY7C1393CV18, CY7C1394CV18
Switching Waveforms
Figure 5. Read/Write/Deselect Sequence [27, 28, 29]
NOP | READ | READ | WRITE | WRITE | READ | NOP |
|
| (burst of 2) | (burst of 2) | (burst of 2) | (burst of 2) | (burst of 2) |
|
|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
K
K
LD
R/W
A
D
Q
C
|
|
|
|
|
|
|
|
|
|
|
|
|
|
tKH |
| tKL |
| tCYC | tKHKH | ||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
tSC
| A0 |
| A1 | A2 |
| A3 |
| A4 |
|
|
t | SA | t | HA |
| tHD |
|
| tHD |
| |
|
|
|
|
|
|
|
|
| ||
|
|
|
|
| tSD |
|
| tSD |
|
|
|
|
|
|
|
| D20 | D21 | D30 | D31 |
|
|
|
|
| Q00 | Q01 | Q10 | Q11 |
| Q40 | Q41 |
|
|
| t KHCH | tCLZ | tCQD | tDOH |
|
|
| |
|
|
|
|
|
|
|
| |||
tKHCH |
|
|
| tCO | tCQDOH |
|
| tCHZ |
| |
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
| |||
C#
CQ
CQ#
tCQOH 
tCQOH
tCCQO
tKH |
| tKL |
tCCQO
tCQH
tCYC
tCQHCQH
tKHKH
DON’T CARE
UNDEFINED
Notes
27.Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0+1.
28.Outputs are disabled
29.In this example, if address A4 = A3, then data Q40 = D30 and Q41 = D31. Write data is forwarded immediately as read results. This note applies to the whole diagram.
Document #: | Page 25 of 30 |
[+] Feedback
