DS80C310 Maxim, DS80C310 Datasheet - Page 15

• Manufacturer Part Number: DS80C310
• Description: The DS80C310 is a fast 80C31/80C32-compatible microcontroller
• Manufacturer: Maxim

EXTERNAL CLOCK CHARACTERISTICS
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
DEFINITION OF AC SYMBOLS
In an effort to remain compatible with the original 8051 family, this device specifies the same parameters
as such devices, using the same symbols. For completeness, the following are description of the symbols.
t
A
C
D
H
L
I
P
Q
R
V
W
X
Z
Note 2:
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
Serial Port Clock Cycle
Time
Output Data Setup to
Clock Rising
Output Data Hold from
Clock Rising
Input Data Hold after
Clock Rising
Clock Rising Edge to
Input Data Valid
PARAMETER
Time
Address
Clock
Input Data
Logic Level High
Logic Level Low
Instruction
Output Data
Valid
No longer a valid logic level
Tri-State
PSEN
RD
WR
PARAMETER
Address is held in a weak latch until overdriven by external memory.
Signal
Signal
SYMBOL
t
t
t
t
t
QVXH
XHQX
XHDX
XHDV
XLXL
SYMBOL
SM2 = 0, 12 clocks per cycle
SM2 = 1, 4 clocks per cycle
SM2 = 0, 12 clocks per cycle
SM2 = 1, 4 clocks per cycle
SM2 = 0, 12 clocks per cycle
SM2 = 1, 4 clocks per cycle
SM2 = 0, 12 clocks per cycle
SM2 = 1, 4 clocks per cycle
SM2 = 0, 12 clocks per cycle
SM2 = 1, 4 clocks per cycle
t
t
t
t
CHCX
CLCX
CHCL
CLCL
CONDITIONS
15 of 22
MIN
10
10
MIN
TYP
12t
10t
11t
4t
3t
2t
3t
TYP
t
t
t
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
MAX
5
5
MAX
DS80C310
UNITS
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns