參數(shù)資料
型號(hào): UPD780021AY
廠商: NEC Corp.
元件分類(lèi): 8位微控制器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁(yè)數(shù): 41/90頁(yè)
文件大?。?/td> 660K
代理商: UPD780021AY
μ
PD78F0034B, 78F0034BY, 78F0034B(A), 78F0034BY(A)
41
Data Sheet U16369EJ1V0DS
(3) Serial Interface (T
A
=
40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
(a) 3-wire serial I/O mode (SCK3n... Internal clock output)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK3n
t
KCY1
4.5 V
V
DD
5.5 V
666
ns
cycle time
3.0 V
V
DD
<
4.5 V
954
ns
2.7 V
V
DD
<
3.0 V
1600
ns
1.8 V
V
DD
<
2.7 V
3200
ns
SCK3n high-/
t
KH1
, t
KL1
3.0 V
V
DD
5.5 V
t
KCY1
/2
50
ns
low-level width
1.8 V
V
DD
<
3.0 V
t
KCY1
/2
100
ns
SI3n setup time
t
SIK1
3.0 V
V
DD
5.5 V
100
ns
(to SCK3n
)
2.7 V
V
DD
< 3.0 V
150
ns
1.8 V
V
DD
<
2.7 V
300
ns
SI3n hold time
t
KSI1
4.5 V
V
DD
5.5 V
300
ns
(from SCK3n
)
1.8 V
V
DD
<
4.5 V
C = 100 pF
Note
400
ns
Delay time from
t
KSO1
4.5 V
V
DD
5.5 V
200
ns
SCK3n
to SO3n
1.8 V
V
DD
<
4.5 V
300
ns
output
Note
C is the load capacitance of the SCK3n and SO3n output lines.
(b) 3-wire serial I/O mode (SCK3n... External clock input)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK3n
t
KCY2
4.5 V
V
DD
5.5 V
666
ns
cycle time
3.0 V
V
DD
<
4.5 V
800
ns
2.7 V
V
DD
<
3.0 V
1600
ns
1.8 V
V
DD
<
2.7 V
3200
ns
SCK3n high-/
t
KH2
, t
KL2
4.5 V
V
DD
5.5 V
333
ns
low-level width
3.0 V
V
DD
<
4.5 V
400
ns
2.7 V
V
DD
<
3.0 V
800
ns
1.8 V
V
DD
<
2.7 V
1600
ns
SI3n setup time
t
SIK2
100
ns
(to SCK3n
)
SI3n hold time
t
KSI2
4.5 V
V
DD
5.5 V
300
ns
(from SCK3n
)
1.8 V
V
DD
<
4.5 V
C = 100 pF
Note
400
ns
Delay time from
t
KSO2
4.5 V
V
DD
5.5 V
200
ns
SCK3n
to SO3n
1.8 V
V
DD
<
4.5 V
300
ns
output
Note
C is the load capacitance of the SO3n output line.
Remark
n = 0, 1
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