参数资料
型号: TMX320F2812GHHS
厂商: Texas Instruments, Inc.
元件分类: 数字信号处理
英文描述: DIGITAL SIGNAL PROCESSORS
中文描述: 数字信号处理器
文件页数: 88/147页
文件大小: 2021K
代理商: TMX320F2812GHHS
Electrical Specifications
88
June 2004
SPRS257
6.8
Signal Transition Levels
Note that some of the signals use different reference voltages, see the recommended operating conditions
table. Output levels are driven to a minimum logic-high level of 2.4 V and to a maximum logic-low level of
0.4 V.
Figure 6
2 shows output levels.
0.4 V (V
OL
)
20%
2.4 V (V
OH
)
80%
Figure 6
2. Output Levels
Output transition times are specified as follows:
For a
high-to-low
transition
, the level at which the output is said to be no longer high is below 80% of the
total voltage range and lower and the level at which the output is said to be low is 20% of the total voltage
range and lower.
For a
low-to-high transition
, the level at which the output is said to be no longer low is 20% of the total
voltage range and higher and the level at which the output is said to be high is 80% of the total voltage
range and higher.
Figure 6
3 shows the input levels.
0.8 V (V
IL
)
10%
2.0 V (V
IH
)
90%
Figure 6
3. Input Levels
Input transition times are specified as follows:
For a
high-to-low transition
on an input signal, the level at which the input is said to be no longer high is
90% of the total voltage range and lower and the level at which the input is said to be low is 10% of the
total voltage range and lower.
For a
low-to-high transition
on an input signal, the level at which the input is said to be no longer low is
10% of the total voltage range and higher and the level at which the input is said to be high is 90% of the
total voltage range and higher.
NOTE:
See the individual timing diagrams for levels used for testing timing parameters.
A
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