MOSEL VITELIC
V53C8256H
Waveforms of CAS-before-RAS Refresh Counter Test Cycle
t
t
RAS (1)
RP (3)
V
V
IH
IL
RAS
t
RSH (W)(25)
t
t
CP(43)
CHR (49)
t
t
CSR (47)
CAS (5)
V
V
IH
IL
CAS
V
V
IH
IL
ADDRESS
t
t
RRH (15)
RCH (14)
READ CYCLE
t
RCS (7)
V
IH
WE
OE
I/O
V
IL
t
ROH (16)
t
OAC (17)
V
IH
V
IL
t
t
HZ (22)
HZ (22)
t
LZ (21)
V
IH
D
OUT
V
IL
t
t
R
WL (31)
CWL (26)
WRITE CYCLE
t
t
WCS (27)
WCH (28)
V
IH
WE
V
IL
V
IH
OE
I/O
V
IL
t
t
DS (32)
DH (33)
V
IH
D
IN
V
IL
8256H-14
Waveforms of CAS-before-RAS Refresh Cycle
t
t
RC (2)
t
t
RP (3)
RP (3)
RAS (1)
V
V
IH
IL
RAS
t
RPC (48)
t
t
t
CHR (49)
CP (43)
HZ (22)
t
CSR (47)
V
V
IH
IL
CAS
I/O
V
V
OH
OL
8256H-15
NOTE: WE, OE, A –A = Don’t care
0
7
Undefined
Don’t Care
V53C8256H Rev. 1.2 July 1997
12
MOSEL [ MOSEL VITELIC, CORP ]
