參數(shù)資料
型號(hào): UPD784907
廠商: NEC Corp.
英文描述: 16-BIT SINGLE-CHIP MICROCONTROLLER
中文描述: 16位單片機(jī)
文件頁數(shù): 76/98頁
文件大小: 657K
代理商: UPD784907
μ
PD784907, 784908
76
Data Sheet U11680EJ2V0DS00
(2) External wait timing
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
WAIT
input time from address
t
DAWT
V
DD
= 5.0 V
(2 + a)T – 40
198
ns
WAIT
input time from ASTB
t
DSTWT
V
DD
= 5.0 V
1.5T – 40
79
ns
WAIT hold time from ASTB
t
HSTWT
V
DD
= 5.0 V
(0.5 + n)T + 5
124
ns
Delay from ASTB
to WAIT
t
DSTWTH
V
DD
= 5.0 V
(1.5 + n)T – 40
238
ns
WAIT
input time from RD
t
DRWTL
V
DD
= 5.0 V
T – 40
39
ns
WAIT hold time from RD
t
HRWT
V
DD
= 5.0 V
nT + 5
84
ns
Delay from RD
to WAIT
t
DRWTH
V
DD
= 5.0 V
(1 + n)T – 40
198
ns
Data input time from WAIT
t
DWTID
V
DD
= 5.0 V
0.5T – 5
35
ns
Delay from WAIT
to RD
t
DWTR
V
DD
= 5.0 V
0.5T
40
ns
Delay from WAIT
to WR
t
DWTW
V
DD
= 5.0 V
0.5T
40
ns
WAIT
input time from WR
t
DWWTL
V
DD
= 5.0 V
T – 40
39
ns
WAIT hold time from WR
t
HWWT
V
DD
= 5.0 V
nT + 5
84
ns
Delay from WR
to WAIT
t
DWWTH
V
DD
= 5.0 V
(1 + n)T – 40
198
ns
Remark
T:
a:
n:
t
CYK
(system clock cycle time) V
DD
= 5.0 V T = 79 ns (MIN.)
1 during address wait, otherwise, 0
number of wait states (n
0)
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