參數(shù)資料
型號: DS89C450
英文描述: Ultra-High-Speed Flash Microcontrollers
中文描述: 超高速閃存微控制器
文件頁數(shù): 9/48頁
文件大小: 934K
代理商: DS89C450
DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
9 of 48
EXTERNAL CLOCK CHARACTERISTICS
(V
CC
= 4.5V to 5.5V, T
O
= -40°C to +85°C.)
PARAMETER
SYMBOL
MIN
MAX
UNITS
Clock High Time
t
CHCX
10
ns
Clock Low Time
t
CLCX
10
ns
Clock Rise Time
t
CLCH
5
ns
Clock Fall Time
t
CHCL
5
ns
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
(V
CC
= 4.5V to 5.5V, T
O
= -40°C to +85°C.) (
Figure 4
)
33MHz
VARIABLE
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
MIN
MAX
UNITS
SM2 = 0
360
12t
CLCL
ns
Clock Cycle Time
t
XLXL
SM2 = 1
120
4t
CLCL
ns
SM2 = 0
200
10t
CLCL
-
100
ns
Output Data Setup to Clock
Rising
t
QVXH
SM2 = 1
40
3t
CLCL
- 10
ns
SM2 = 0
50
2t
CLCL
- 10
ns
Output Data Hold to Clock
Rising
t
XHQX
SM2 = 1
20
t
CLCL
- 100
SM2 = 0
0
0
ns
Input Data Hold After Clock
Rising
t
XHDX
SM2 = 1
0
0
SM2 = 0
200
10t
CLCL
- 100
ns
Clock Rising Edge to Input
Data Valid
t
XHDV
SM2 = 1
40
3t
CLCL
- 50
ns
Note:
SM2 is the serial port 0 mode bit 2. When serial port 0 is operating in mode 0 (SM0 = SM1 = 0), SM2 determines the number of crystal
clocks in a serial port clock cycle.
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參數(shù)描述
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