AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 408
![no-image](/images/no-image-200.jpg)
AT90USB1286-16MU
Manufacturer Part Number
AT90USB1286-16MU
Description
Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90USB1286-16MU.pdf
(434 pages)
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Table 30-5.
Notes:
30.10 External Data Memory Timing
Table 30-6.
Notes:
408
0
1
2
3a
3b
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
R
V
R
INT2
REF
AIN
Symbol
1/t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
LHLL
AVLL
LLAX_ST
LLAX_LD
AVLLC
AVRL
AVWL
LLWL
LLRL
DVRH
RLDV
RHDX
RLRH
DVWL
WHDX
DVWH
WLWH
1. Values are guidelines only. Actual values are TBD
2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1.
1. This assumes 50% clock duty cycle. The half period is actually the high time of the external clock, XTAL1.
CLCL
AT90USB64/128
Parameter
Internal Voltage Reference
Reference Input Resistance
Analog Input Resistance
ADC Characteristics (Continued)
External Data Memory Characteristics, 4.5 - 5.5 Volts, No Wait-state
Parameter
Oscillator Frequency
ALE Pulse Width
Address Valid A to ALE Low
Address Hold After ALE Low,
write access
Address Hold after ALE Low,
read access
Address Valid C to ALE Low
Address Valid to RD Low
Address Valid to WR Low
ALE Low to WR Low
ALE Low to RD Low
Data Setup to RD High
Read Low to Data Valid
Data Hold After RD High
RD Pulse Width
Data Setup to WR Low
Data Hold After WR High
Data Valid to WR High
WR Pulse Width
2.56V
Condition
8 MHz Oscillator
57.5
57.5
47.5
47.5
42.5
Min
115
115
115
125
115
115
115
40
5
5
0
Max
67.5
67.5
75
Min
2.4
(1)
0.5t
0.5t
0.5t
0.5t
0.5t
1.0t
1.0t
1.0t
1.0t
1.0t
1.0t
1.0t
CLCL
CLCL
CLCL
CLCL
CLCL
Min
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
0.0
40
5
5
0
CLCL
Variable Oscillator
-15
-15
-20
Typ
-5
-5
-10
-10
-10
-10
-10
-10
2.56
100
32
(1)
(1)
(2)
(2)
(1)
(1)
0.5t
0.5t
1.0t
Max
2.8
CLCL
CLCL
Max
CLCL
16
(1)
+5
+5
-50
(2)
(2)
7593A–AVR–02/06
Units
MΩ
kΩ
V
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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