UPD70F3102-33 NEC [NEC], UPD70F3102-33 Datasheet - Page 42

• Manufacturer Part Number: UPD70F3102-33
• Description: 32-/16-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC [NEC]

(6) DRAM access timing
42
WAIT setup time (to CLKOUT )
WAIT hold time (from CLKOUT )
Data input setup time (to CLKOUT )
Data input hold time (from CLKOUT )
Delay time from OE to data output
Row address setup time
Row address hold time
Column address setup time
Column address hold time
Read/write cycle time
RAS recharge time
RAS pulse time
RAS hold time
Column address read time for RAS
CAS pulse width
CAS to RAS precharge time
CAS hold time
WE setup time
WE hold time (from RAS )
WE hold time (from CAS )
CAS precharge time
Output enable access time
RAS access time
Access time from column address
CAS access time
Remarks 1. T = t
(a) Read timing (high-speed page DRAM access, normal access: off-page) (1/3)
Parameter
2. w: Number of waits due to WAIT
3. w
4. w
5. w
6. i: Number of idle states inserted when a write cycle follows the read cycle.
RP
RH
DA
: Number of waits specified by RPCxx bit of register DRCn (n = 0 to 3, xx = 00 to 03, 10 to 13)
: Number of waits specified by DACxx bit of register DRCn (n = 0 to 3, xx = 00 to 03, 10 to 13)
: Number of waits specified by RHCxx bit of register DRCn (n = 0 to 3, xx = 00 to 03, 10 to 13)
CYK
<24>
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<27>
<37>
<56>
<57>
<58>
<59>
<60>
<61>
<62>
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Symbol
Preliminary Data Sheet U13844EJ2V0DS00
t
DRDOD
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
HKID
SWK
HKW
SKID
t
t
RRH
RCH
t
ASR
RAH
ASC
CAH
RAS
RSH
RAL
CAS
CRP
CSH
RCS
CPN
OEA
RAC
CAC
RC
RP
AA
Conditions
(1.5 + w
(3 + w
(1.5 + w
(2 + w
(2 + w
(2 + w
(2.5 + w
(2 + w
(1 + w
(0.5 + w
(0.5 + w
(0.5 + w
(1 + w
(0.5 + i) T – 10
RP
RH
RP
RP
0.5T – 10
0.5T – 10
DA
DA
+ w
+ w
T – 10
T – 10
DA
DA
T – 10
RH
MIN.
+ w
+ w
RP
15
18
+ w) T – 10
+ w) T – 10
RP
RH
RP
2
2
DA
+ w) T – 10
+ w) T – 10
RH
+ w
) T – 10
) T – 10
) T – 10
) T – 10
RH
RH
+ w) T – 10
+ w
) T – 10
) T – 10
DA
DA
+ w)
+ w)
(2 + w
(2 + w
(1.5 + w
(1 + w
RH
RP
DA
+ w
+ w
T – 28
DA
MAX.
+ w) T – 28
DA
RH
+ w) T – 28
PD70F3102-33
+ w) T – 28
+ w
DA
+ w)
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