DS80C320-MCG+ Dallas Semiconductor, DS80C320-MCG+ Datasheet - Page 29

• Manufacturer Part Number: DS80C320-MCG+
• Description: Microcontroller, 8051 Comp., 4 8-Bit I/O Ports, 64K ROM/RAM, 25 MHz, 5 V, PDIP40
• Manufacturer: Dallas Semiconductor

Specifications of DS80C320-MCG+

• Eeprom Memory: 0 Bytes
• Input Output: 32
• Interface: UART
• Memory Type: ROMless
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 0 Bytes
• Ram Size: 256 Bytes
• Speed: 25 MHz
• Timers: 3-16-bit
• Voltage, Range: 4.25-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

EXTERNAL CLOCK CHARACTERISTICS
SERIAL PORT MODE 0 TIMING CHARACTERISTICS
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.
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
Serial Port Clock
Cycle Time
Output Data Setup to
Clock Rising Edge
Output Data Hold
from Clock Rising
Input Data Hold After
Clock Rising
Clock Rising Edge to
Input Data Valid
PARAMETER
t
A
C
D
H
L
I
P
PARAMETER
Time
Address
Clock
Input data
Logic level high
Logic level low
Instruction
PSEN
SYMBOL
t
t
t
t
t
QVXH
XHQX
XHDX
XHDV
XLXL
SYMBOL
t
t
t
t
CHCX
CLCX
CLCH
CHCL
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
CONDITIONS
MIN
10
10
29 of 40
Q
R
V
W
X
Z
TYP
Valid
Output data
No longer a valid logic level
Tri-state
RD
WR
MIN
signal
signal
MAX
5
5
12t
10t
11t
4t
3t
2t
2t
TYP
t
t
t
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
UNITS
MAX
ns
ns
ns
ns
UNITS
ns
ns
ns
ns
ns