参数资料
型号: KSZ8842-16MQL
厂商: Micrel Inc
文件页数: 104/141页
文件大小: 0K
描述: IC SWITCH 10/100 16BIT 128PQFP
标准包装: 66
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: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 128-BFQFP
供应商设备封装: 128-PQFP(14x20)
包装: 管件
产品目录页面: 1081 (CN2011-ZH PDF)
配用: 576-1634-ND - BOARD EVALUATION KSZ8842-16MQL
其它名称: 576-1478-5
Micrel, Inc.
KSZ8842-16/32 MQL/MVL/MVLI/MBL
October 2007
65
M9999-102207-1.9
Bank 16 Transmit Control Register (0x00): TXCR
This register holds control information programmed by the CPU to control the QMU transmit module function.
Bit
Default Value
R/W
Description
15
-
RO
Reserved
14
0x0
RW
Reserved
13
0x0
RW
Reserved
12-4
-
RO
Reserved
3
0x0
RW
TXFCE Transmit Flow Control Enable
When this bit is set, the QMU sends flow control pause frames from the host port if the
RX FIFO has reached its threshold.
Note: the SGCR3[5] in Bank 32 also needs to be enabled.
2
0x0
RW
TXPE Transmit Padding Enable
When this bit is set, the KSZ8842M automatically adds a padding field to a packet
shorter than 64 bytes.
Note: Setting this bit requires enabling the ADD CRC feature to avoid CRC errors for
the transmit packet.
1
0x0
RW
TXCE Transmit CRC Enable
When this bit is set, the KSZ8842M automatically adds a CRC checksum field to the
end of a transmit frame.
0
0x0
RW
TXE Transmit Enable
When this bit is set, the transmit module is enabled and placed in a running state.
When reset, the transmit process is placed in the stopped state after the transmission
of the current frame is completed.
Bank 16 Transmit Status Register (0x02): TXSR
This register keeps the status of the last transmitted frame.
Bit
Default Value
R/W
Description
15-6
0x000
RO
Reserved
5-0
-
RO
TXFID Transmit Frame ID
This field identifies the transmitted frame. All of the transmit status information in this
register belongs to the frame with this ID.
Bank 16 Receive Control Register (0x04): RXCR
This register holds control information programmed by the CPU to control the receive function.
Bit
Default Value
R/W
Description
15-11
-
RO
Reserved
10
0x0
RW
RXFCE Receive Flow Control Enable
When this bit is set, the KSZ8842M will acknowledge a PAUSE frame from the receive
interface; i.e., the outgoing packets are pending in the transmit buffer until the PAUSE
frame control timer expires. When this bit is cleared, flow control is not enabled.
9
0x0
RW
RXEFE Receive Error Frame Enable
When this bit is set, CRC error frames are allowed to be received into the RX queue.
When reset, all CRC error frames are discarded.
8
-
RO
Reserved
7
0x0
RW
RXBE Receive Broadcast Enable
When this bit is set, the RX module receives all the broadcast frames.
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