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參數(shù)資料
| 型號(hào)： | C9706AY |
| 英文描述： | ST92141 - 8/16 BIT MCU FOR 3-PHASE AC MOTOR CONTROL |
| 中文描述： | CPU系統(tǒng)時(shí)鐘發(fā)生器| SSOP封裝| 48PIN |塑料 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 248K |
| 代理商： | C9706AY |
C9706
Clock Generator for VIA VT8371/Athlon (K7) Chipset Systems
Approved Product
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07041 Rev. **
05/02/2001
Page 4 of 19
Strapping Resistor Options for pins with internal
Pull-downs:
The power up bi-directional pins have a large value pull-down (50K
+/20
K
)
, therefore, a selection “0” is the default. If
the system uses a slow power supply (over 10mS settling time), then
it is recommended
to use an external Pull-down
(Rdn) in order to insure a low selection. In this case, the designer may choose one of two configurations, see Fig.6A
and B.
Fig. 4A represents an additional pull down resistor 5K
connected from the pin to the power line, which allows a faster
down to a high level.
If a selection “1” is desired, then a jumper is placed on JP1 to a 1 K
resistor as shown in Fig.5A. Please note the
selection resistors (Rup and Rdn
)
are placed before the Damping resistor (Rd) close to the pin.
Fig. 4B represent a single resistor 5K
connected to a 3-way jumper, JP2. When a “1” selection is desired, a jumper is
placed between leads1 and 3. When a “0” selection is desired, a jumper is placed between leads 1 and 2.
Vdd
Load
Load
Fig. 4A
Fig. 4B
Vdd
Rup
1K
Rd
IMI C9706
Bidirectional
JP1
JUMPER
JP2
3 W ay Jum per
Rsel
5K
Rd
IMI C9706
Bidirectional
Rdn
5K
1
2
3
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