參數(shù)資料
型號(hào)： 80960JS
廠商： Intel Corp.
英文描述： High Performance 32-bit Embedded 3.3V Microprocessor(3.3V高性能32位嵌入式處理器)
中文描述： 高性能32位嵌入式微處理器3.3（3.3高性能32位嵌入式處理器）
文件頁(yè)數(shù)： 42/86頁(yè)
文件大?。?/td> 1257K
代理商： 80960JS
80960JA/JF/JD/JS/JC/JT 3.3 V Microprocessor
42
Datasheet
4.3
Connection Recommendations
For clean on-chip power distribution, V
CC
and V
SS
pins separately feed the device
’
s functional units.
Power and ground connections must be made to all 80960Jx power and ground pins. On the circuit board,
every V
CC
pin should connect to a power plane and every V
SS
pin should connect to a ground plane. Place
liberal decoupling capacitance near the 80960Jx, since the processor can cause transient power surges.
The 80960JS/JC/JT processors are produced on Intel
’
s advanced CMOS process. Proper bulk decoupling
must be used to prevent device damage during initial power up and during transitions from low power
mode to normal processor operation. Power supply behavior during these transitions can cause the power
supply to exceed the maximum V
CC
specification and may cause device damage.
Pay special attention to the Test Reset (TRST#) pin. It is essential that the JTAG Boundary Scan Test
Access Port (TAP) controller initializes to a known state whether it will be used or not. If the JTAG
Boundary Scan function will be used, connect a pulldown resistor between the TRST# pin and V
SS
. If the
JTAG Boundary Scan function will not be used (even for board-level testing), connect the TRST# pin to
V
SS
.
Do not connect the TDI, TDO, and TCK pins if the TAP Controller will not be used.
Note:
Pins identified as NC must not be connected in the system.
4.4
VCC5 Pin Requirements (VDIFF)
In 3.3 V only systems where the 80960Jx input pins are driven from 3.3 V logic, connect the VCC5
pin directly to the 3.3 V V
CC
plane.
In mixed voltage systems where the processor is powered by 3.3 V and interfaces with 5 V
components, VCC5 must be connected to 5 V. This allows proper 5 V tolerant buffer operation,
and prevents damage to the input pins. The voltage differential between the 80960Jx VCC5 pin and
its 3.3 V V
CC
pins must not exceed 2.25 V. If this requirement is not met, current flow through the
pin may exceed the value at which the processor is damaged. Instances when the voltage can
exceed 2.25 V is during power up or power down, where one source reaches its level faster than the
other, briefly causing an excess voltage differential. Another instance is during steady-state
operation, where the differential voltage of the regulator (provided a regulator is used) cannot be
maintained within 2.25 V. Two methods are possible to prevent this from happening:
Use a regulator that is designed to prevent the voltage differential from exceeding 2.25 V.
or:
As shown in Figure 8, place a 100
resistor in series with the VCC5 pin to limit the current
through VCC5.
Figure 8. VCC5 Current-Limiting Resistor
+5 V (±0.25 V)
VCC5 Pin
100
(±5%, 0.5 W)
相關(guān)PDF資料
PDF描述
80960JC High Performance 32-Bit Embedded 3.3V Microprocessor(3.3V高性能32位嵌入式處理器)
80960KB Embedded 32-Bit Microprocessor With Integrated Floating-Point Unit(帶有集成的浮點(diǎn)單元的嵌入式32位微處理器)
80960MC Embedded 32Bit Microprocessor With Integrated Floating_Point Unit And Memory Unit(帶有集成的浮點(diǎn)單元和存儲(chǔ)器管理單元的嵌入式32位微處理器)
80960RM 80960RM I/O Processor(80960RM I/O 處理器)
80960RN 80960RN I/O Processor(80960RN I/O 處理器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
80960JT 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:3.3 V EMBEDDED 32-BIT MICROPROCESSOR
80960KA 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:EMBEDDED 32-BIT MICROPROCESSOR
80960KB 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:EMBEDDED 32-BIT MICROPROCESSOR WITH INTEGRATED FLOATING-POINT UNIT
80960MC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:EMBEDDED 32-BIT MICROPROCESSOR WITH INTEGRATED FLOATING-POINT UNIT AND MEMORY MANAGEMENT UNIT
80960SA 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:EMBEDDED 32-BIT MICROPROCESSOR WITH 16-BIT BURST DATA BUS
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