參數(shù)資料
型號: μPD780021
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 44/64頁
文件大?。?/td> 487K
代理商: ΜPD780021
44
μ
PD780021, 780022, 780023, 780024
Preliminary Data Sheet
(3) Serial Interface (T
A
= –40 to +85
°
C, V
DD
= 1.8 to 5.5 V)
(a) 3-wire serial I/O mode (SCK30, SCK31... Internal clock output)
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
SCK30, SCK31
t
KCY1
4.5 V
V
DD
5.5 V
954
ns
cycle time
2.7 V
V
DD
<
4.5 V
1600
ns
3200
ns
SCK30, SCK31 high-/
t
KH1
, t
KL1
V
DD
= 4.5 to 5.5 V
t
KCY1
/2–50
ns
low-level width
t
KCY1
/2–100
ns
SI30, SI31 setup time
t
SIK1
4.5 V
V
DD
5.5V
100
ns
(to SCK30, SCK31
)
2.7 V
V
DD
< 4.5V
150
ns
300
ns
SI30, SI31 hold time
(from SCK30, SCK31
)
t
KSI1
400
ns
SO30, SO31
output
dealy time from
SCK30, SCK31
t
KSO1
C = 100 pF
Note
300
ns
(b) 3-wire serial I/O mode (SCK30, SCK31... External clock input)
Note
C is the load capacitance of the SCK30, SCK31, SO30, and SO31 output lines.
t
KCY2
Parameter
Symbol
Test Conditions
MIN.
TYP.
MAX.
Unit
SCK30, SCK31
4.5 V
V
DD
5.5 V
800
ns
cycle time
2.7 V
V
DD
< 4.5 V
1600
ns
3200
ns
SCK30, SCK31 high-/
t
KH2
, t
KL2
4.5 V
V
DD
5.5 V
400
ns
low-level width
2.7 V
V
DD
< 4.5 V
800
ns
1600
ns
SI30, SI31 setup time
(to SCK30, SCK31
)
t
SIK2
100
ns
SI30, SI31 hold time
(from SCK30, SCK31
)
t
KSI2
400
ns
SO30, SO31 output
dealy time from
SCK30, SCK31
t
KSO2
C = 100 pF
Note
300
ns
SCK30, SCK31 rise,
fall time
t
R2
, t
F2
When using external device
expansion function
160
ns
When not using When using
external device 16-bit timer
expansion
function
700
ns
expansion
function
When not
using 16-bit
timer
expansion
function
1000
ns
Note
C is the load capacitance of the SO30 and SO31 output lines.
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