UPD70F3102-33 NEC [NEC], UPD70F3102-33 Datasheet - Page 64

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

64
RAS precharge time
RAS pulse width
CAS hold time
REFRQ pulse width
RAS precharge CAS hold time
REFRQ active delay time
(from CLKOUT )
REFRQ inactive delay time
(from CLKOUT )
CAS setup time
Note w
Remarks 1. T = t
Note This TRCW is always inserted, regardless of the setting of bits RCW0 to RCW2 of register RWC.
Remarks 1. These timings are for the following cases:
(i) CBR refresh timing
CLKOUT (Output)
REFRQ (Output)
UCAS (Output)
RASn (Output)
LCAS (Output)
RCW
Parameter
2. w
3. w
2. n = 0 to 7
is inserted for at least 1 clock, regardless of the setting of bits RCW0 to RCW2 of register RWC.
Number of waits (TRRW) specified by bits RRW0 and RRW1 of register RWC: 1
Number of waits (TRCW) specified by bits RCW0 to RCW2 of register RWC: 2
RRW
RCW
CYK
: Number of waits specified by bits RRW0 and RRW1 of register RWC
: Number of waits specified by bits RCW0 to RCW2 of register RWC.
TRRW
<108>
<109>
<110>
<111>
<112>
<113>
<61>
<62>
<111>
<110>
Symbol
Preliminary Data Sheet U13844EJ2V0DS00
t
t
t
<61>
t
t
t
t
WRFL
DKRF
HKRF
t
CHR
RPC
CSR
RAS
RP
T1
<113>
Conditions
T2
TRCW
(1.5 + w
(1.5 + w
<109>
(3 +w
(1.5 + w
(0.5 + w
RRW
Note
T – 10
T – 10
RCW
RCW
MIN.
RRW
RRW
2
2
+ w
Note
Note
) T – 10
) T – 10
TRCW
RCW
) T – 10
) T – 10
<108>
<62>
Note
)
T3
MAX.
10
10
TI
PD70F3102-33
<112>
<110>
Unit
ns
ns
ns
ns
ns
ns
ns
ns