DS80C320 Datasheet, PDF (31/42 Pages) Dallas Semiconductor – High-Speed/Low-Power Micro

DS80C320/DS80C323
DS80C320/DS80C323 EXTERNAL CLOCK CHARACTERISTICS
PARAMETER
SYMBOL MIN TYP MAX UNITS
NOTES
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
t_CHCX
10
t_CLCX
10
t_CLCH
t_CHCL
ns
ns
5
ns
5
ns
DS80C320/DS80C323 SERIAL PORT MODE 0 TIMING CHARACTERISTICS
PARAMETER
SYMBOL MIN TYP MAX UNITS
NOTES
Serial Port Clock Cycle Time
t_XLXL
12t_CLCL
ns
SM2=0 12 clocks per cycle
4t_CLCL
SM2=1 4 clocks per cycle
Output Data Setup to Clock
t_QVXH
10t_CLCL
ns
Rising Edge
3t_CLCL
SM2=0 12 clocks per cycle
SM2=1 4 clocks per cycle
Output Data Hold from Clock
t_XHQX
2t_CLCL
ns
Rising
t_CLCL
SM2=0 12 clocks per cycle
SM2=1 4 clocks per cycle
Input Data Hold after Clock
t_XHDX
t_CLCL
ns
Rising
t_CLCL
SM2=0 12 clocks per cycle
SM2=1 4 clocks per cycle
Clock Rising Edge to Input
t_XHDV
11t_CLCL
ns
Data Valid
2t_CLCL
SM2=0 12 clocks per cycle
SM2=1 4 clocks per cycle
EXPLANATION OF AC SYMBOLS
In an effort to remain compatible with the original 8051 family, this device specifies the same parameter
as such devices, using the same symbols. For completeness, the following is an explanation of the
symbols.
t Time
A Address
C Clock
D Input data
H Logic level high
L Logic level low
I Instruction
P PSEN
Q Output data
R RD signal
V Valid
W WR signal
X No longer a valid logic level
Z Tristate
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