DS80C411 Maxim, DS80C411 Datasheet - Page 5
![no-image](/images/no-image-200.jpg)
DS80C411
Manufacturer Part Number
DS80C411
Description
The DS80C410/DS80C411 network microcontrollers offer the highest integration available in an 8051 device
Manufacturer
Maxim
Datasheet
1.DS80C410.pdf
(102 pages)
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EXTERNAL CLOCK OSCILLATOR (XTAL1) CHARACTERISTICS
EXTERNAL CLOCK DRIVE
SYSTEM CLOCK TIME PERIODS (t
Note 1:
Note 2: When an external clock oscillator is used in conjunction with the default system clock selection (CD1:CD0 = 10b), the
MOVX CHARACTERISTICS (MULTIPLEXED ADDRESS/DATA BUS) (Note 1)
(V
MOVX ALE Pulse Width
Port 0 MOVX Address Valid
to ALE Low
Port 0 MOVX Address Hold
after ALE Low
RD Pulse Width (P3.7 or
PSEN)
WR Pulse Width (P3.6)
RD (P3.7 or PSEN) Low to
Valid Data In
Data Hold After RD (P3.7 or
PSEN) High
Clock Oscillator Period
Clock Symmetry at 0.5 x V
Clock Rise Time
Clock Fall Time
SYSTEM CLOCK SELECTION
CC3
4X/2X
X
X
1
0
XTAL1
= 3.0V to 3.6V, V
Figure 21
PARAMETER
minimum/maximum system clock high (t
CD1
shows a detailed description and illustration of the system clock selection.
0
0
1
1
PARAMETER
CC1
CD0
0
0
0
1
CC3
= 1.8V ±10%, T
t
t
SYMBOL
and t
CF
CH
t
t
t
t
t
t
t
WLWH
LHLL2
AVLL2
LLAX2
RLRH
RHDX
RLDV
t
LLAX3
CLK
SYSTEM CLOCK
PERIOD t
CHCL
t
CL
256 t
t
t
(4 x C
(4 x C
CLK
CLK
t
A
) and system clock low (t
t
CLCL
CLK
= -40 °C to +85°C.)
2t
6t
5t
5t
2t
2t
/ 4
/ 2
CLK
t
t
t
t
CHCL
CLCH
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
ST
ST
+ t
CLCL
MIN
-2
CLCL
) t
) t
CHCL
- 6
- 2
- 5
- 2
CLCL
CLCL
- 5
- 5
- 6
- 2
- 5
- 5
t
CR
, t
- 5
5 of 102
- 3
- 3
CHCL
SYMBOL
t
t
t
t
CLK
CH
CR
CF
, t
SYSTEM CLOCK HIGH (t
0.45 (256 t
CLCH
0.45 (t
0.45 (t
CLCH
(4 x C
0.45 t
SYSTEM CLOCK LOW (t
) periods are directly related to clock oscillator duty cycle.
MIN
2t
CLK
CLK
)
CLCL
ST
CLK
MAX
) t
/ 4)
/ 2)
CLK)
CLCL
- 18
0.45 t
Oscillator Frequency
MIN
See External Clock
- 18
CLK
0.55 (256 t
0.55 (t
0.55 (t
CHCL
0.55 t
UNITS
MAX
CLCH
0.55 t
ns
ns
ns
ns
ns
ns
ns
) AND
MAX
CLK
CLK
CLK
3
3
)
/ 4)
/ 2)
CLK
CLK)
STRETCH VALUES
C
4 ≤ C
4 ≤ C
4 ≤ C
1 ≤ C
1 ≤ C
1 ≤ C
1≤ C
1≤ C
1≤ C
ST
C
C
C
C
C
C
(MD2:0)
ST
ST
ST
ST
ST
ST
UNITS
ST
ST
ST
ST
ST
ST
ST
ST
ST
= 0
= 0
= 0
= 0
= 0
= 0
ns
ns
ns
≤ 3
≤ 3
≤ 7
≤ 7
≤3
≤ 7
≤ 7
≤ 7
≤ 7
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