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参数资料
| 型号： | 4450HG/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： | ROHS COMPLIANT, HSBGA-324 |
| 文件页数： | 57/92页 |
| 文件大小： | 780K |
| 代理商： | 4450HG/3-K |
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4450 – Data Sheet, DS-0131-06
Page 60
Hifn Confidential
RGMII/RTBI signaling on the 4450 supports either 1.5V HSTL or 2.5V LVCMOS for both the
host and network interfaces. The dpu_gpio[2]/RGMII/RTBI voltage Level is used to
select can optionally be used to select between 1.5V HSTL or 2.5V LVCMOS if tied high or
low respectively. The voltage selection applies to both host and network sides assuming
they both use one of the RGMII/RTBI interface options.
Boot Rate Select
The Boot Rate Select function allows the user to boot the 4450 Host 0 interface in either
100Mbps or 1Gbps depending on the level of the esc_gpio[2]/100M/1G Boot signal. If
asserted high following reset, the Host 0 port will attempt to boot from the host at
100Mbps. If asserted low, the Host 0 GMAC will boot at 1Gbps.
RMII MAC/PHY Select
The esc_gpio[3]/RMII MAC/PHY signal following reset is used to configure the RMII
Optional Control interface to boot in either PHY or MAC mode if the signal is asserted high
or low following reset.
PHY Interrupt (Optional)
The PHY Interrupt input may be used with Hifn’s Station Management (STM) software to
connect to PHY Interrupts notifying the STM software that an auto negotiation event has
occurred in the PHY.
DDR2 Configuration
In applications using external DDR2 memory, three gpio pins are used for determining
memory sizing and use of On Die Termination (ODT). The dpu_gpio[4:3] pins
(ddr_config_1 and ddr_config_0) are used to select the DDR2 Memory configurations
per the table below. For memory configurations between 64M and 256M, the a[13]\cke
functions as cke (clock enable). For the 512M Byte configuration, the functionality of pin
a[13]\cke is address pin a[13].
Fiber PHY Control Signals (Optional)
Table 6-23. DDR2 Memory Configuration Sizing
Memory Size
ddr_config_1
ddr_config_0
64 M Bytes
0
128 M Bytes
0
1
256 M Bytes
1
0
512 M Bytes
1
相关PDF资料 |
PDF描述 |
|---|---|
| 4450HA/3-K | MICROPROCESSOR, PBGA324 |
| 45-21/LK2C-B56702C4CB2/2T | SINGLE COLOR LED, COOL WHITE |
| 45-21/LK2C-B38452C4CB2/2T | SINGLE COLOR LED, WARM WHITE |
| 45-21/QK2C-B45562C4CB2/2T | SINGLE COLOR LED, COOL WHITE |
| 45-21/QK2C-B56702C4CB41/2T | SINGLE COLOR LED, COOL WHITE |
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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