DS89C430 Maxim, DS89C430 Datasheet - Page 9

• Manufacturer Part Number: DS89C430
• Description: The DS89C430 and DS89C450 offer the highest performance available in 8051-compatible microcontrollers
• Manufacturer: Maxim

EXTERNAL CLOCK CHARACTERISTICS
(V
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
(V
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.
Clock Cycle Time
Output Data Setup to Clock
Rising
Output Data Hold to Clock
Rising
Input Data Hold After Clock
Rising
Clock Rising Edge to Input
Data Valid
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
CC
CC
= 4.5V to 5.5V, T
= 4.5V to 5.5V, T
PARAMETER
PARAMETER
O
O
= -40°C to +85°C.)
= -40°C to +85°C.)
SYMBOL
t
t
t
t
t
QVXH
XHQX
XHDX
XHDV
XLXL
SM2 = 0
SM2 = 1
SM2 = 0
SM2 = 1
SM2 = 0
SM2 = 1
SM2 = 0
SM2 = 1
SM2 = 0
SM2 = 1
(Figure
CONDITIONS
4)
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
9 of 46
SYMBOL
t
t
t
t
CHCX
CLCX
CLCH
CHCL
MIN
360
120
200
40
50
20
0
0
33MHz
MAX
200
40
MIN
10
10
2t
3t
t
10t
CLCL
CLCL
12t
CLCL
4t
100
MIN
CLCL
CLCL
0
0
CLCL
- 100
VARIABLE
- 10
- 10
-
MAX
10t
5
5
3t
CLCL
CLCL
MAX
- 100
- 50
UNITS
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns