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參數(shù)資料
| 型號： | KSZ8995XA |
| 廠商： | MICREL INC |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | Integrated 5-Port 10/100 QoS Switch |
| 中文描述： | DATACOM, LAN SWITCHING CIRCUIT, PQFP128 |
| 封裝： | LEAD FREE, PLASTIC, QFP-128 |
| 文件頁數(shù)： | 28/51頁 |
| 文件大?。?/td> | 305K |
| 代理商： | KSZ8995XA |
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KS8995XA
Configuration Interface
The KS8995XA functions as a unmanaged switch. If no EEPROM exists, the KS8995XA will operate from its default and strap-
in settings.
I2C Master Serial Bus Configuration
If a 2-wire EEPROM exists, the KS8995XA can perform more advanced features like broadcast storm protection and rate
control. The EEPROM should have the entire valid configuration data from register 0 to register 109 defined in the memory
map, except the status registers. The configuration access time (t
prgm
) is less than 15ms as shown in Figure 10.
RST_N
Micrel, Inc.
M9999-051305
28
May 2005
....
....
....
SCL
SDA
t
prgm<15 ms
Figure 10. EEPROM Configuration Timing Diagram
To configure the KS8995XA with a pre-configured EEPROM use the following steps:
At the board level, connect pin 110 on the KS8995XA to the SCL pin on the EEPROM. Connect pin 111 on the
KS8995XA to the SDA pin on the EEPROM.
Be sure the board-level reset signal is connected to the KS8995XA reset signal on pin 115 (RST_N).
Program the contents of the EEPROM before placing it on the board with the desired configuration data. Note that
the first byte in the EEPROM must be “95” for the loading to occur properly. If this value is not correct, all other data
will be ignored.
Place EEPROM on the board and power up the board. Assert the active-low board level reset to RST_N on the
KS8995XA. After the reset is de-asserted, the KS8995XA will begin reading configuration data from the EEPROM.
The configuration access time (t
prgm
) is less than 15ms.
Note: For proper operation, make sure pin 47 (PWRDN_N) is not asserted during the reset operation.
MII Management Interface (MIIM)
A standard MIIM interface is provided for all five PHY devices in the KS8995XA. An external device with MDC/MDIO capability
is able to read PHY status or to configure PHY settings. For details on the MIIM interface standard, please reference the IEEE
802.3 specification (section 22.2.4.5). The MIIM interface does not have access to all the configuration registers in the
KS8995XA. It can only access the standard MII registers. See “MIIM Registers” section.
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| KSZ8995XA4 | 功能描述:IC SWITCH 5-PORT 10/100 128PQFP RoHS:是 類別:集成電路 (IC) >> 專用 IC 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:調(diào)幀器 應(yīng)用:數(shù)據(jù)傳輸 安裝類型:表面貼裝 封裝/外殼:400-BBGA 供應(yīng)商設(shè)備封裝:400-PBGA（27x27） 包裝:散裝 |
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| KSZ8997 | 功能描述:以太網(wǎng) IC 8 Port 10/100 Switch with PHY and Frame Buffers (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
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