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参数资料
| 型号： | 4450HA/3-K |
| 厂商： | EXAR CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROPROCESSOR, PBGA324 |
| 封装： | HSBGA-324 |
| 文件页数： | 52/92页 |
| 文件大小： | 780K |
| 代理商： | 4450HA/3-K |
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4450 – Data Sheet, DS-0131-06
Page 56
Hifn Confidential
the Hifn IKE is going to run on the eSC (64 MBytes should be allowed for IKE.)
a Non-IKE eSC image is needed (Generally, 32 MBytes of external SDRAM is an
adequate allowance for a non-IKE image)
more than the maximum number of internal SAs are required (An approximation of
required memory for SA storage is 220 bytes per SA entry)
Additional details regarding memory sizing requirements will be detailed in the next
revision of this data sheet.
6.4.4
No SDRAM Configuration
In the case where only the DPU firmware will be used and the on chip SA requirements are
limited to a total of 200 SAs, the SDRAM can be eliminated from the design. This prevents
the eSC from being used for any operations other than using the RMII port to communicate
to the DPU.
Table 6-18 summarizes the DDR signals connections if the DDR interface is not used.
6.5 PLL Interface
The 4450 provides an on-chip phase-locked loop (PLL) to generate clock signals for the
entire chip. The GMII & MII interfaces will normally run from clocks supplied by the
interface, however in certain loss-of-clock conditions they can be driven from internal
clocks as well. The SERDES and SGMII interfaces also run from externally-supplied
reference clocks. The PLL interface signals are all referenced to supply voltage VDDE.
Table 6-18. No SDRAM Configuration
DDR Signal Name
Connection
DDR_CONFIG[2:0]
pull-down (0 ohms to 1 k-ohms)
VDDA_DDR_PLL
must be connected to 1.0V
VSSA_DDR_PLL
must be connected to ground
VREF_DDR_[2:0]
0.9V DDR2 Voltage Reference for SSTL bi-directional I/O
SDCLK_DIFF_P/N
open
SDCLK_FB_O
connect to SDCLK_FB_I through 50-ohm resistor
All control signals (includes ODT,
CS_N, RAS_N, CAS_N, WE_N,
BA[2:0], and A[13:0])
open
DQ[31:0], ECC[6:0]
open
DM[7:0], ECCDM
open
DQS[7:0], ECCS
pull-down (1 k-ohms)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 445-0X | 制造商:APEX 功能描述:TOOLS, HEX BITS; Bit Type:Slotted; Hex Bit Size:3F-4R; Length:25mm; Size:1" ;RoHS Compliant: NA |
| 4451 | 功能描述:电缆固定件和配件 PG 7 HYBRID CG .87X.59 .12-.28 RoHS:否 制造商:Heyco 类型:Cable Grips, Liquid Tight 材料:Nylon 颜色:Black 安装方法:Cable 最大光束直径:11.4 mm 抗拉强度: |
| 44510 | 功能描述:钳子和镊子 ESD Safe Tweezers 7a SA - 120mm RoHS:否 制造商:OK Industries 大小: 类型:Insertion/Extraction Tools And Kit |
| 44-510 | 制造商:RAWLPLUG 功能描述:RAWLBOLT PROJECTING M625P |
| 445100170 | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:SR10 24VAC/DC OR 110/220VAC |
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