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參數(shù)資料
| 型號(hào)： | IBM25PPC750FX-EB0122T |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 600 MHz, RISC PROCESSOR, CBGA292 |
| 封裝： | 21 X 21 MM, 1 MM PITCH, CERAMIC, BGA-292 |
| 文件頁數(shù)： | 43/62頁 |
| 文件大?。?/td> | 452K |
| 代理商： | IBM25PPC750FX-EB0122T |
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Datasheet
DD
2.X
PowerPC
750FX
RISC
Microprocessor
Preliminary
5.
System
Design
Information
Page
46
of
63
Body_750FX_DS_DD2.X.fm.2.0
June
9,
2003
SYSCLK
High
Input
Clock Control
Keeper
No resistor by
design
Active driver
3, 4, 5
TA
Low
Input
Data Termination
Keeper
Active driver
3, 4, 5
TBEN
High
Input
TBST
Low
Input/Output
Transfer Attributes
Keeper
1, 3, 4
TCK
High
Input
JTAG
Not enabled
External
pulldown
5K
to GND
5
TDI
High
Input
JTAG
Enabled high
Internal
enabled
50
a@2.5V
25
a@1.8V
(the pullup current for the inter-
nal resistor)
5
TDO
High
Output
JTAG
Keeper
3, 4
TEA
Low
Input
Data Termination
Keeper
Active driver or pullup
3, 4, 5
TLBISYNC
Low
Input
Control
Keeper
Must be actively driven
3, 4
TMS
High
Input
JTAG
Enabled high
Internal
enabled
50
a@2.5V
25
a@1.8V
(the pullup current for the inter-
nal resistor)
5
TRST
Low
Input
JTAG
Enabled high
Internal
enabled
50
a@2.5V
25
a@1.8V
(the pullup current for the inter-
nal resistor)
2, 5
TS
Low
Input/Output
Address Start
Keeper
5K
Pullup required to OVDD
3, 4, 5
TSIZ[0:2]
High
Output
Transfer Attributes
Keeper
1, 3, 4
Table 5-6. Input-Output Usage (Continued)
750FX Signal
Name
Active Level
Input/
Output
Usage Group
Input/Output with
Internal
Pullup Resistors
Level Protect
Required
External
Resistor
Comments
Notes
Notes:
1. Depends on the system design. The electrical characteristics of the 750FX do not add additional constraints to the system design, so whatever is done with the net will depend on the system require-
ments.
2. HRESET, SRESET, and TRST are signals used for ESP and RISCWatch to enable proper operation of the debuggers. Logical AND gates should be placed between these signals and PowerPC
750FX RISC Microprocessor. (Refer to Figure 5-7 on page 48.)
3. The 750FX provides protection from meta-stability on inputs through the use of a “keeper” circuit on specific inputs. Refer to Level Protection on page 48 for a more detailed description.
4. If a system design requires a signal level to be maintained while not being actively driven, an external resistor or device must be used (Keepers assure no meta-stability of inputs but do not guarantee
a level).
5. The 750FX does not require external pullups on address and data lines. Control lines must be treated individually.
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