參數(shù)資料
型號(hào): UPD780024A
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 40/90頁
文件大小: 660K
代理商: UPD780024A
μ
PD78F0034B, 78F0034BY, 78F0034B(A), 78F0034BY(A)
40
Data Sheet U16369EJ1V0DS
(2) Read/write operation
(T
A
=
40 to +85
°
C, V
DD
= 1.8 to 2.7 V)
(3/3)
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
ASTB high-level width
t
ASTH
0.3t
CY
ns
Address setup time
t
ADS
120
ns
Address hold time
t
ADH
20
ns
Input time from address to data
t
ADD1
(2 + 2n)t
CY
233
ns
t
ADD2
(3 + 2n)t
CY
240
ns
Output time from RD
to address
t
RDAD
0
400
ns
Input time from RD
to data
t
RDD1
(2 + 2n)t
CY
325
ns
t
RDD2
(3 + 2n)t
CY
332
ns
Read data hold time
t
RDH
0
ns
RD low-level width
t
RDL1
(1.5 + 2n)t
CY
92
ns
t
RDL2
(2.5 + 2n)t
CY
92
ns
Input time from RD
to WAIT
t
RDWT1
t
CY
350
ns
t
RDWT2
t
CY
132
ns
Input time from WR
to WAIT
t
WRWT
t
CY
100
ns
WAIT low-level width
t
WTL
(0.5 + 2n)t
CY
+ 10
(2 + 2n)t
CY
ns
Write data setup time
t
WDS
60
ns
Write data hold time
t
WDH
20
ns
WR low-level width
t
WRL1
(1.5 + 2n)t
CY
60
ns
Delay time from ASTB
to RD
t
ASTRD
20
ns
Delay time from ASTB
to WR
t
ASTWR
2t
CY
60
ns
Delay time from RD
to ASTB
in
external fetch
t
RDAST
0.8t
CY
60
1.2t
CY
ns
Hold time from RD
to address in
external fetch
t
RDADH
0.8t
CY
60
1.2t
CY
+ 120
ns
Write data output time from RD
t
RDWD
40
ns
Write data output time from WR
t
WRWD
40
240
ns
Hold time from WR
to address
t
WRADH
0.8t
CY
60
1.2t
CY
+ 120
ns
Delay time from WAIT
to RD
t
WTRD
0.5t
CY
2.5t
CY
+ 100
ns
Delay time from WAIT
to WR
t
WTWR
0.5t
CY
2.5t
CY
+ 100
ns
Caution T
CY
can only be used when the MIN. value is 1.6
μ
s.
Remarks 1.
t
CY
= T
CY
/4
2.
n indicates the number of waits.
3.
C
L
= 100 pF (C
L
is the load capacitance of the AD0 to AD7, A8 to A15, RD, WR, WAIT, and ASTB
pins.)
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