參數(shù)資料
型號: μPD78075B
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數(shù): 47/76頁
文件大小: 568K
代理商: ΜPD78075B
47
μ
PD78074B, 78075B
Parameter
Symbol
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
Data input time from address
t
ADD1
(2.85 + 2n)t
CY
– 80
ns
t
ADD2
(4 + 2n)t
CY
– 100
ns
Data input time from RD
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
WAIT
input time from RD
t
RDWT1
0.85t
CY
– 50
ns
t
RDWT2
2t
CY
– 60
ns
WAIT
input time from WR
t
WRWT
2t
CY
– 60
ns
WAIT low-level width
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
Load resistance
5 k
20
ns
WR low-level width
t
WRL1
(2.85 + 2n)t
CY
– 60
ns
RD
delay time from ASTB
t
ASTRD
25
ns
WR
delay time from ASTB
t
ASTWR
0.85t
CY
+ 20
ns
ASTB
delay time from
RD
at external fetch
t
RDAST
0.85t
CY
– 10
1.15t
CY
+ 20
ns
Address hold time from
RD
at external fetch
t
RDADH
0.85t
CY
– 50
1.15t
CY
+ 50
ns
Write data output time from RD
t
RDWD
40
ns
Write data output time from WR
t
WRWD
0
50
ns
Address hold time from WR
0.85t
CY
– 20
1.15t
CY
+ 40
ns
RD
delay time from WAIT
t
WTRD
1.15t
CY
+ 40
3.15t
CY
+ 40
ns
WR
delay time from WAIT
t
WTWR
1.15t
CY
+ 30
3.15t
CY
+ 30
ns
t
WRADH
(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)
Remarks 1.
MCS
: Oscillation mode select register (OSMS) bit 0
2.
PCC2 to PCC0 : Processor clock control register (PCC) bit 2 to bit 0
3.
t
CY
= T
CY
/4
4.
n indicates the number of waits.
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