ADSP-TS202S_06 AD [Analog Devices], ADSP-TS202S_06 Datasheet - Page 37

• Manufacturer Part Number: ADSP-TS202S_06
• Description: TigerSHARC Embedded Processor
• Manufacturer: AD [Analog Devices]

–100
–100
–110
–11
–22
–33
–44
–55
–66
–77
–88
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
110
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
88
77
66
55
44
33
22
11
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0
0
0
V
V
V
DD_IO
Figure 31. Typical Drive Currents at Strength 5
Figure 32. Typical Drive Currents at Strength 6
Figure 33. Typical Drive Currents at Strength 7
DD_IO
V
DD_IO
V
DD_IO
DD_IO
I
0.4
I
0.4
I
0.4
OL
OL
OL
V
= 2.38V, +105°C
= 2.38V, +105°C
DD_IO
= 2.38V, +105°C
= 2.38V, +105°C
= 2.38V, +105°C
= 2.38V, +105°C
0.8
0.8
0.8
OUTPUT PIN VOLTAGE (V)
OUTPUT PIN VOLTAGE (V)
OUTPUT PIN VOLTAGE (V)
V
V
V
V
DD_IO
DD_IO
V
DD_IO
V
DD_IO
DD_IO
DD_IO
STRENGTH 5
STRENGTH 6
STRENGTH 7
1.2
1.2
1.2
= 2.5V, +25°C
= 2.5V, +25°C
= 2.5V, +25°C
= 2.5V, +25°C
= 2.5V, +25°C
= 2.5V, +25°C
1.6
1.6
1.6
V
V
V
V
V
V
DD_IO
DD_IO
DD_IO
DD_IO
DD_IO
DD_IO
2.0
2.0
2.0
= 2.63V, –40°C
= 2.63V, –40°C
= 2.63V, –40°C
= 2.63V, –40°C
= 2.63V, –40°C
= 2.63V, –40°C
Rev. C | Page 37 of 48 | December 2006
I
I
I
2.4
2.4
2.4
OH
OH
OH
2.8
2.8
2.8
TEST CONDITIONS
The ac signal specifications (timing parameters) appear in
Table 29 on Page
enable time, and capacitive loading. The timing specifications
for the DSP apply for the voltage reference levels in
Output Disable Time
Output pins are considered to be disabled when they stop driv-
ing, go into a high impedance state, and start to decay from their
output high or low voltage. The time for the voltage on the bus
to decay by ΔV is dependent on the capacitive load, C
load current, I
lowing equation:
The output disable time t
t
t
switches to when the output voltage decays ΔV from the mea-
sured output high or output low voltage. t
with test loads C
MEASURED_DIS
MEASURED_DIS
OUTPUT
Figure 34. Voltage Reference Levels for AC Measurements
(Except Output Enable/Disable)
V
V
INPUT
REFERENCE
OL (MEASURED)
OH (MEASURED)
OR
SIGNAL
and t
is the interval from when the reference signal
L
. This decay time can be approximated by the fol-
1.25V
t
L
DIS
28. These include output disable time, output
Figure 35. Output Enable/Disable
DECAY
and I
OUTPUT STOPS
t
DECAY
t
MEASURED_DIS
DRIVING
L
as shown in
, and with ΔV equal to 0.4 V.
VOLTAGE TO BE APPROXIMATELY 1.25V.
DIS
is the difference between
TEST CONDITIONS CAUSE THIS
=
V
V
t
HIGH IMPEDANCE STATE.
OL (MEASURED)
DECAY
(
OH (MEASURED)
C
L
Δ
Figure
V
) I
⁄
ADSP-TS202S
t
DECAY
L
ENA
+ V
35. The time
– V
t
t
OUTPUT STARTS
RAMP
MEASURED_ENA
is calculated
0.85V
1.65V
DRIVING
Figure
L
1.25V
and the
34.