參數(shù)資料
型號： TMS320F241PGS
廠商： TEXAS INSTRUMENTS INC
元件分類： 數(shù)字信號處理
英文描述： 0-BIT, 5 MHz, OTHER DSP, PQFP64
封裝： PLASTIC, QFP-64
文件頁數(shù)： 98/122頁
文件大?。?/td> 1465K
代理商： TMS320F241PGS
TMS320F243, TMS320F241
DSP CONTROLLERS
SPRS064D DECEMBER 1997 REVISED FEBRUARY 2006
77
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
PARAMETER MEASUREMENT INFORMATION
Tester Pin
Electronics
VLOAD
IOL
CT
IOH
Output
Under
Test
50
Where:
IOL
=
2 mA (all outputs)
IOH
=
300
A (all outputs)
VLOAD =
1.5 V
CT
=
110-pF typical load-circuit capacitance
Figure 17. Test Load Circuit
signal transition levels
The data in this section is shown for the 5-V version. Note that some of the signals use different reference
voltages, see the recommended operating conditions table. TTL-output levels are driven to a minimum
logic-high level of 2.4 V and to a maximum logic-low level of 0.7 V.
Figure 18 shows the TTL-level outputs.
0.7 V (VOL)
20%
2.4 V (VOH)
80%
Figure 18. TTL-Level Outputs
TTL-output transition times are specified as follows:
D 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.
D For alow-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 19 shows the TTL-level inputs.
0.7 V (VIL)
10%
2.0 V (VIH)
90%
Figure 19. TTL-Level Inputs
TTL-compatible input transition times are specified as follows:
D 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.
D 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.
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