DS89C430 Datasheet, PDF (9/48 Pages) Dallas Semiconductor – Ultra-High-Speed Flash Microcontrollers

DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
EXTERNAL CLOCK CHARACTERISTICS
(V_CC = 4.5V to 5.5V, T_O = -40°C to +85°C.)
PARAMETER
SYMBOL
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
tCHCX
tCLCX
tCLCH
tCHCL
MIN
MAX
UNITS
10
ns
10
ns
5
ns
5
ns
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
(V_CC = 4.5V to 5.5V, T_O = -40°C to +85°C.) (Figure 4)
PARAMETER
SYMBOL
CONDITIONS
33MHz
MIN
MAX
SM2 = 0
360
Clock Cycle Time
tXLXL
SM2 = 1
120
SM2 = 0
200
Output Data Setup to Clock
Rising
tQVXH
SM2 = 1
40
VARIABLE
MIN
MAX
12tCLCL
4tCLCL
10tCLCL -
100
3tCLCL - 10
UNITS
ns
ns
ns
ns
Output Data Hold to Clock
Rising
Input Data Hold After Clock
Rising
tXHQX
tXHDX
SM2 = 0
SM2 = 1
SM2 = 0
SM2 = 1
50
2tCLCL - 10
ns
20
tCLCL - 100
0
0
ns
0
0
Clock Rising Edge to Input
Data Valid
tXHDV
SM2 = 0
SM2 = 1
200
10tCLCL - 100
ns
40
3tCLCL - 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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