參數(shù)資料
型號: uPD70F3102GJ-33-8EU
廠商: NEC Corp.
英文描述: 32-/16-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 32-/16-BIT單片機(jī)
文件頁數(shù): 64/82頁
文件大?。?/td> 476K
代理商: UPD70F3102GJ-33-8EU
Preliminary Data Sheet U13844EJ2V0DS00
64
μ
PD70F3102-33
(i)
CBR refresh timing
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
RAS precharge time
<61>
t
RP
(1.5 + w
RRW
) T – 10
ns
RAS pulse width
<62>
t
RAS
(1.5 + w
RCW
Note
) T – 10
ns
CAS hold time
<108>
t
CHR
(1.5 + w
RCW
Note
) T – 10
ns
REFRQ pulse width
<109>
t
WRFL
(3 +w
RRW
+ w
RCW
T – 10
Note
)
ns
RAS precharge CAS hold time
<110>
t
RPC
(0.5 + w
RRW
) T – 10
ns
REFRQ active delay time
(from CLKOUT
)
<111>
t
DKRF
2
10
ns
REFRQ inactive delay time
(from CLKOUT
)
<112>
t
HKRF
2
10
ns
CAS setup time
<113>
t
CSR
T – 10
ns
Note
w
RCW
is inserted for at least 1 clock, regardless of the setting of bits RCW0 to RCW2 of register RWC.
Remarks 1.
T = t
CYK
2.
w
RRW
: Number of waits specified by bits RRW0 and RRW1 of register RWC
3.
w
RCW
: Number of waits specified by bits RCW0 to RCW2 of register RWC.
TI
REFRQ (Output)
T3
TRCW
TRCW
Note
T2
T1
TRRW
<109>
<111>
<112>
RASn (Output)
<62>
UCAS (Output)
<108>
<110>
<61>
<113>
<110>
LCAS (Output)
CLKOUT (Output)
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:
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
2.
n = 0 to 7
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