參數(shù)資料
型號： ADSP-TS101SKB2250X
廠商： ANALOG DEVICES INC
元件分類： 數(shù)字信號處理
英文描述： 64-BIT, 125 MHz, OTHER DSP, PBGA484
封裝： 19 X 19 MM, METRIC, PLASTIC, BGA-484
文件頁數(shù)： 10/42頁
文件大?。?/td> 774K
代理商： ADSP-TS101SKB2250X
For current information contact Analog Devices at 800/262-5643
ADSP-TS101S
February 2002
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
18
REV. PrE
PRELIMINARY TECHNICAL DATA
Table 10. Pin definitions—Impedance and Drive Strength Control
Signal
Type
Description
CONTROLIMP2–1
1
CONTROLIMP0
2
I (pu)
I (pd)
Impedance Control. Every group of outputs has two controls:
dig_ctrl
0 = Disabled (maximum drive strength)
1 = Enabled (use DSx drive strength selection)
pulse
0 = Disabled (constant drive strength as selected by DSx pins)
1 = Enabled (2 ns pulse for max drive at the beginning of the transition;
constant drive otherwise as selected by DSx pins)
For ADC (Address/Data/Controls) and LINK (all link port outputs) signals, the
CONTROLIMP2–0 pins control impedance as shown in Table 11.
DS2–0
I (pu)
Digital Drive Strength Selection. Selected as shown in Table 12. For drive strength
A = asynchronous; G = ground; I = input; O = output; o/d = open drain output; P = power supply;
pd = internal pulldown 100 k
; pu = internal pullup 100 k; T = Three-State
1 The internal 100 k
internal pullup may not be sufficient depending on system noise and/or leakage. A stronger pullup may be necessary.
2 The internal 100 k
internal pulldown may not be sufficient depending on system noise and/or leakage. A stronger pulldown may be necessary.
Table 11. Control Impedance Selection
CONTROLIMP2–0
ADC
LINK
dig_ctrl
pulse dig_ctrl
pulse
000
0X
001
0X
010
0X
10
011
0X
11
100
10
0X
101
11
0X
110 (default)
1
0
1
0
111
11
Table 12. Drive Strength Selection
DS2–0Drive Strength
000
11%
001
29%
010
37%
011
49%
100
62%
101
75%
110
88%
111 (default)
100%
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