參數(shù)資料
型號： UPD789122UC-XXX-5A4
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, MICROCONTROLLER, PDSO30
封裝： 0.300 INCH, SHRINK, PLASTIC, SOP-30
文件頁數(shù)： 31/54頁
文件大?。?/td> 481K
代理商： UPD789122UC-XXX-5A4
Data Sheet U13025EJ2V0DS00
35
PD789121, 789122, 789124, 789131, 789132, 789134
(2) Serial interface (TA = –40 to +85
°°°°C, VDD = 2.7 to 5.5 V)
(i) 3-wire serial I/O mode (SCK20...Internal clock output)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK20 cycle time
tKCY1
800
ns
SCK20 high-/low-
level width
tKH1,
tKL1
tKCY1/2 – 50
ns
SI20 setup time
(to SCK20
↑)
tSIK1
150
ns
SI20 hold time
(from SCK20
↑)
tKSI1
400
ns
SO20 output delay
time from SCK20
↓
TKDS2
R = 1 k
,
C = 100 pF
Note
0
250
ns
Note R and C are the load resistance and load capacitance of the SO output line.
(ii) 3-wire serial I/O mode (SCK20...External clock input)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
SCK20 cycle time
tKCY2
900
ns
SCK20 high-/low-
level width
tKH2,
tKL2
400
ns
SI20 setup time
(to SCK20
↑)
tSIK2
100
ns
SI20 hold time
(from SCK20
↑)
tKSI2
400
ns
SO20 output delay
time from SCK20
↓
tKSO2
R = 1 k
,
C = 100 pF
Note
0
300
ns
SO20 setup
(for SS20
↓ when
SS20 is used)
tKAS2
120
ns
SO20 disable time
(for SS20
↑ when
SS20 is used)
tKDS2
240
ns
Note R and C are the load resistance and load capacitance of the SO output line.
(iii) UART mode (Dedicated baud rate generator output)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Transfer rate
78125
bps
(iv) UART mode (external clock input)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
ASCK20 cycle time
tKCY3
900
ns
ASCK20 high-/low-
level width
tKH3,
tKL3
400
ns
Transfer rate
39063
bps
ASCK20 rise/fall time
tR,
tF
1
s
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