參數(shù)資料
型號: μPD78070A
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 47/74頁
文件大?。?/td> 481K
代理商: ΜPD78070A
m
PD78070A
46
(2)
Read/Write Operation
(a)
When MCS = 1, PCC2 to PCC0 = 000B
(T
A
= –40 to +85 °C, V
DD
= 4.5 to 5.5 V)
Parameter
Symbol
Test Conditions
MIN.
MAX.
Unit
ASTB high-level width
t
ASTH
0.85t
CY
– 50
ns
Address setup time
t
ADS
0.85t
CY
– 50
ns
Address hold time
t
ADH
50
ns
Address
Data input time
t
ADD1
(2.85 + 2n) t
CY
– 80
ns
t
ADD2
(4 + 2n) t
CY
– 100
ns
RD
Data input time
t
RDD1
(2 + 2n) t
CY
– 100
ns
t
RDD2
(2.85 + 2n) t
CY
– 100
ns
Read data hold time
t
RDH
0
ns
RD low-level width
t
RDL1
(2 + 2n) t
CY
– 60
ns
t
RDL2
(2.85 + 2n) t
CY
– 60
ns
RD
WAIT
input time
t
RDWT1
0.85t
CY
– 50
ns
t
RDWT2
2t
CY
– 60
ns
WR
WAIT
input time
WAIT low-level width
t
WRWT
2t
CY
– 60
ns
t
WTL
(1.15 + 2n) t
CY
(2 + 2n) t
CY
ns
Write data setup time
t
WDS
(2.85 + 2n) t
CY
– 100
ns
Write data hold time
t
WDH
20
ns
WR low-level width
t
WRL
(2.85 + 2n) t
CY
– 60
ns
ASTB
RD
delay time
ASTB
WR
delay time
In external fetch RD
ASTB
delay time
In external fetch RD
address hold time
t
ASTRD
25
ns
t
ASTWR
0.85t
CY
+ 20
ns
t
RDAST
0.85t
CY
– 10
1.15t
CY
+ 20
ns
t
RDADH
0.85t
CY
– 50
1.15t
CY
+ 50
ns
RD
write data output time
WR
write data output time
WR
address hold time
WAIT
RD
delay time
WAIT
WR
delay time
t
RDWD
40
ns
t
WRWD
0
50
ns
t
WRADH
0.85t
CY
1.15t
CY
+ 40
ns
t
WTRD
1.15t
CY
+ 40
3.15t
CY
+ 40
ns
t
WTWR
1.15t
CY
+ 30
3.15t
CY
+ 30
ns
Remarks
1.
2.
3.
4.
MCS: Bit 0 of the oscillation mode selection register (OSMS)
PCC2-PCC0: Bit 2 to bit 0 of the processor clock control register (PCC)
t
CY
= T
CY
/4
n indicates the number of waits.
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