参数资料
型号: KSZ8842-PMBL AM
厂商: Micrel Inc
文件页数: 51/119页
文件大小: 0K
描述: IC ETHERNET SW 2PORT 100-LFBGA
标准包装: 260
控制器类型: 以太网开关控制器
接口: PCI
电源电压: 3.1 V ~ 3.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-LFBGA
供应商设备封装: 100-LFBGA
包装: 托盘
产品目录页面: 1081 (CN2011-ZH PDF)
配用: 576-1636-ND - BOARD EVALUATION KSZ8842-PMQL
其它名称: 576-3348
Micrel, Inc.
KSZ8842-PMQL/PMBL
October 2007
37
M9999-100207-1.5
The following table shows the RDES1 register bit fields.
Bit
Description
31 – 26
Reserved
25
RER Receive End of Ring
When set, indicates that the descriptor list reached its final descriptor. The KSZ8842-
PMQL/PMBL returns to the base address of the list, thus creating a descriptor ring.
24 – 11
Reserved
10 – 0
RBS Receive Buffer Size
Indicates the size, in bytes, of the receive data buffer. If the field is 0, the KSZ8842-
PMQL/PMBL ignores this buffer and moves to the next descriptor.
The buffer size must be a multiple of 4.
The following table shows the RDES2 register bit fields.
Bit
Description
31 – 0
Buffer Address
Indicates the physical memory address of the buffer.
The buffer address must be Word aligned.
The following table shows the RDES3 register bit fields.
Bit
Description
31 – 0
Next Descriptor Address
Indicates the physical memory address of the next descriptor in the descriptor ring.
The buffer address must be Word aligned.
Transmit Descriptors (TDES0-TDES3)
Transmit descriptors must be Word aligned. Each descriptor provides one frame buffer, one byte count field, and
control and status bits.
The following table shows the TDES0 register bit fields.
Bit
Description
31
OWN Own Bit
When set, indicates that the descriptor is owned by the KSZ8842-PMQL/PMBL. When
cleared, indicates that the descriptor is owned by the host. The KSZ8842-PMQL/PMBL
clears this bit either when it completes the frame transmission or when the buffer allocated in
the descriptor is empty.
The ownership bit of the first descriptor of the frame should be set after all subsequent
descriptors belonging to the same frame have been set. This avoids a possible race
condition between the KSZ8842-PMQL/PMBL fetching a descriptor and the driver setting an
ownership bit.
30 – 0
Reserved
The following table shows the TDES1 register bit fields.
Bit
Description
31
IC Interrupt on Completion
When set, the KSZ8842-PMQL/PMBL sets transmit interrupt after the present frame has
been transmitted. It is valid only when last segment is set.
30
FS First Segment
When set, indicates that the buffer contains the first segment of a frame.
29
LS Last Segment
When set, indicates that the buffer contains the last segment of a frame.
相关PDF资料
PDF描述
V72A28C400BL3 CONVERTER MOD DC/DC 28V 400W
V72A28C400BL2 CONVERTER MOD DC/DC 28V 400W
V72A28C400BL CONVERTER MOD DC/DC 28V 400W
V72A28C400B3 CONVERTER MOD DC/DC 28V 400W
V72A15C400BG3 CONVERTER MOD DC/DC 15V 400W
相关代理商/技术参数
参数描述
KSZ8842-PMBL-EVAL 功能描述:以太网开发工具 2+1 Port 10/100 Ethernet Switch with 32b/33MHz PCI Interface (BGA Version) Eval Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压:
KSZ8842-PMBL-TR 功能描述:Ethernet Switch 10/100 Base-T/TX PHY PCI Interface 100-LFBGA (9x9) 制造商:microchip technology 系列:- 包装:剪切带(CT) 零件状态:停产 协议:以太网 功能:开关 接口:PCI 标准:10/100 Base-T/TX PHY 电压 - 电源:3.1 V ~ 3.5 V 电流 - 电源:122mA 工作温度:-40°C ~ 85°C 封装/外壳:100-LFBGA 供应商器件封装:100-LFBGA(9x9) 标准包装:1
KSZ8842-PMQL 功能描述:以太网 IC 2-Port Ethernet Switch/Repeater + 32-bit/33MHz PCI bus interface(Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray
KSZ8842-PMQL-EVAL 功能描述:以太网开发工具 KSZ8842-PMQL Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压:
KSZ8842-PMQLI 功能描述:以太网 IC 2-Port Ethernet Switch/Repeater + 32-bit/33MHz PCI bus interface, Ind Temp (Lead Free) RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray