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參數(shù)資料
| 型號： | PC7410 |
| 廠商： | Atmel Corp. |
| 英文描述： | PowerPC 7410 RISC Microprocessor Product Specification |
| 中文描述： | 7410的PowerPC RISC微處理器產(chǎn)品規(guī)格 |
| 文件頁數(shù)： | 43/54頁 |
| 文件大?。?/td> | 692K |
| 代理商： | PC7410 |
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43
PC7410
2141D–HIREL–02/04
Figure 31.
Driver Impedance Measurement
Table 19 summarizes the signal impedance results. The impedance increases with junc-
tion temperature and is relatively unaffected by bus voltage.
Pull-up Resistor
Requirements
The PC7410 requires pull-up resistors (1 k
–5 k
) on several control pins of the bus
interface to maintain the control signals in the negated state after they have been
actively negated and released by the PC7410 or other bus masters. These pins are: TS,
ARTRY, SHDO, SHD1.
Four test pins also require pull-up resistors (100
–1 k
). These pins are CHK,
L1_TSTCLK, L2_TSTCLK, and LSSD_MODE. These signals are for factory use only
and must be pulled up to OV
DD
for normal machine operation.
If pull-down resistors are used to configure BVSEL or L2VSEL, the resistors should be
less than 250
.
(see Table 12). Because PLL_CFG[0:3] must remain stable during nor-
mal operation, strong pull-up and pull-down resistors (1 k
or less) are recommended to
configure these signals in order to protect against erroneous switching due to ground
bounce, power supply noise or noise coupling.
In addition, CKSTP_OUT is an open-drain style output that requires a pull-up resistor
(1 k
–5 k
) if it is used by the system. The CKSTP_IN signal should likewise be pulled
up through a pull-up resistor (1 k
–5 k
) to prevent erroneous assertions of this signal.
Table 19.
Impedance Characteristics with V
DD
= 1.8V, OV
DD
= 1.8V or 2.5V,
T
j
= -55
°
C to 125
°
C
Impedance
Processor bus
L2 Bus
Symbol
Unit
R
N
R
P
41.5 - 54.3
42.7 - 54.1
Z
0
Ohms
37.3 - 55.3
39.3 - 50
Z
0
Ohms
OV
DD
OGND
SW2
SW1
RN
RP
Pad
Data
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PC7410M16 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PC7410M16 [Updated 12/02. 35 Pages] |
| PC7410MG400LE | 制造商:e2v technologies 功能描述:MPU 7410 RISC 64BIT 0.18UM 400MHZ 1.8V/2.5V/3.3V 360CBGA - Trays |
| PC7410MG400NE | 制造商:e2v technologies 功能描述:MPU 7410 RISC 64BIT 0.18UM 400MHZ 1.8V/2.5V/3.3V 360CBGA - Trays |
| PC7410MG450LE | 制造商:e2v technologies 功能描述:MPU 7410 RISC 64BIT 0.18UM 450MHZ 1.8V/2.5V/3.3V 360CBGA - Trays |
| PC7410MG450NE | 制造商:e2v technologies 功能描述:MPU 7410 RISC 64BIT 0.18UM 450MHZ 1.8V/2.5V/3.3V 360CBGA - Trays |
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