UPD30121F1-168-GA1 NEC, UPD30121F1-168-GA1 Datasheet - Page 39

• Manufacturer Part Number: UPD30121F1-168-GA1
• Description: VR4121TM 64-/32-BIT MICROPROCESSOR
• Manufacturer: NEC

MRAS (0:3)# pulse width
MRAS (0:3)# hold time (from UCAS#/LCAS# precharge)
MRAS (0:3)# precharge time
UCAS#/LCAS# hold time (from MRAS (0:3)#)
UCAS#/LCAS# pulse width
UCAS#/LCAS# precharge time
Read/write cycle time
MRAS (0:3)# hold time (from UCAS#/LCAS#)
Row address setup time (to MRAS (0:3)#)
UCAS#/LCAS#
Column address delay time from MRAS (0:3)#
Column address setup time (to UCAS#/LCAS#)
Column address read time (to MRAS (0:3)# )
Row address hold time (from MRAS (0:3)# )
Column address hold time 1 (from UCAS#/LCAS# )
Column address hold time 2 (from UCAS#/LCAS# )
Column address hold time 3 (from UCAS#/LCAS# )
Data access time (from UCAS#/LCAS# precharge)
Data access time (from RD# )
Data input setup time 1 (to UCAS#/LCAS# )
Data input hold time 1 (from MRAS (0:3)#)
Data input setup time 2 (to UCAS#/LCAS# )
Data input hold time 2 (from MRAS (0:3)#)
Data access time (from MRAS (0:3)# )
Data access time (from column address)
Data access time (from UCAS#/LCAS# )
(5) EDO-type DRAM read parameter (1/2)
Caution These ratings are applied only when a device operates within the recommended operating
The target DRAM is the
42S65165G5-A50, or 42S65165G5-A60.
condition range and the operating ambient temperature is kept constant.
If the power supply voltage or operating ambient temperature changes during DRAM access, the
above ratings are not applied.
delay time from MRAS (0:3)#
Parameter
PD42S16165L-A60, 42S18165L-A60, 42S64165G5-A50, 42S64165G5-A60,
Data Sheet U14691EJ1V0DS00
Symbol
t
t
t
t
t
t
RHCP
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RASP
HCAS
CAH1
CAH2
CAH3
t
t
CSH
HPC
RSH
ASR
RCD
RAD
ASC
RAH
ACP
OEA
RAC
t
CAC
RAL
DS1
DH1
DS2
DH2
RP
CP
AA
Condition
MIN.
70
45
43
50
10
10
25
25
24
22
40
20
10
10
10
39
25
70
30
20
0
0
0
5
0
5
MAX.
PD30121
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
39