參數(shù)資料
型號(hào)： UPD78218A
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(yè)數(shù)： 44/66頁(yè)
文件大小： 510K
代理商： UPD78218A
44
μ
PD78217A, 78218A
X1 input clock cycle time
t
CYX
82
250
ns
Address setup time (to ASTB
↓
)
t
SAST
52
ns
Address hold time (from ASTB
↓
)
Note
t
HSTA
25
ns
Address hold time (from RD
↑
)
t
HRA
30
ns
Address hold time (from WR
↑
)
t
HWA
30
ns
RD
↓
delay time from address
t
DAR
129
ns
Address float time (from RD
↓
)
t
FAR
11
ns
Data input time from address
t
DAID
No. of waits = 0
228
ns
Data input time from ASTB
↓
t
DSTID
No. of waits = 0
181
ns
Data input time from RD
↓
t
DRID
No. of waits = 0
100
ns
RD
↓
delay time from ASTB
↓
t
DSTR
52
ns
Data hold time (from RD
↑
)
t
HRID
0
ns
Address active time from RD
↑
t
DRA
124
ns
ASTB
↑
delay time from RD
↑
t
DRST
124
ns
RD low-level width
t
WRL
No. of waits = 0
124
ns
ASTB high-level width
t
WSTH
52
ns
WR
↓
delay time from address
t
DAW
129
ns
Data output time from ASTB
↓
t
DSTOD
142
ns
Data output time from WR
↓
t
DWOD
60
ns
t
DSTW1
Refreshing disabled
52
ns
t
DSTW2
Refreshing enabled
129
ns
Data setup time (to WR
↑
)
t
SODWR
No. of waits = 0
146
ns
Data setup time (to WR
↓
)
t
SODWF
Refreshing enabled
22
ns
Data hold time (from WR
↑
)
Note
t
HWOD
20
ns
ASTB
↑
delay time from WR
↑
t
DWST
42
ns
Refreshing disabled
No. of waits = 0
Refreshing enabled
No. of waits = 0
WAIT
↓
input time from address
t
DAWT
146
ns
WAIT
↓
input time from ASTB
↓
t
DSTWT
84
ns
AC CHARACTERISTICS (T
A
= –40 to +85
°
C, V
DD
= +5 V
±
10 %, V
SS
= 0 V)
READ/WRITE OPERATION (1/2)
WR
↓
delay time from ASTB
↓
PARAMETER
SYMBOL
TEST CONDITIONS
MIN.
MAX.
UNIT
WR low-level width
t
WWL1
t
WWL2
114
ns
Note
The hold time includes the time to hold the V
OH
and V
OL
under the load conditions of C
L
= 100 pF and
R
L
= 2 k
.
Remarks 1.
The values in the above table are based on "f
XX
= 12 MHz and C
L
= 100 pF".
2.
For a parameter with a dot (
) in the SYMBOL column, refer to "
t
CYX
DEPENDENT BUS TIMING
DEFINITION
" as well.
196
ns
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