Cypress CY62256 Технический паспорт - Страница 5
Просмотреть онлайн или скачать pdf Технический паспорт для Компьютерное оборудование Cypress CY62256. Cypress CY62256 11 страниц. 256k (32k x 8) static ram
Печатать страницу
Switching Waveforms
[12, 13]
Read Cycle No. 2
CE
OE
HIGH IMPEDANCE
DATA OUT
V
CC
SUPPLY
CURRENT
Write Cycle No. 1 (WE Controlled)
ADDRESS
CE
WE
OE
DATA I/O
NOTE
Write Cycle No. 2 (CE Controlled)
ADDRESS
CE
WE
DATA I/O
Notes:
13. Address valid prior to or coincident with CE transition LOW.
14. Data I/O is high impedance if OE = V
15. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
Document #: 38-05248 Rev. *B
(continued)
t
ACE
t
DOE
t
LZOE
t
LZCE
t
PU
50%
[9, 14, 15]
t
AW
t
SA
16
t
HZOE
[9, 14, 15]
t
SA
t
AW
.
IH
t
RC
DATA VALID
t
WC
t
PWE
t
SD
DATA
VALID
IN
t
WC
t
SCE
t
SD
DATA
VALID
IN
CY62256
t
HZOE
t
HZCE
HIGH
IMPEDANCE
t
PD
50%
t
HA
t
HD
t
HA
t
HD
Page 5 of 11
ICC
ISB