参数资料
型号: CORE10/100-RM
厂商: Microsemi SoC
文件页数: 38/106页
文件大小: 0K
描述: IP CORE10/100 ETHERNET MAC
标准包装: 1
系列: *
Software Interface
Table 4-22 · Missed Frames and Overflow Counter Bit Functions
Core10100 v4.0
Bit
CSR8.28
CSR8.(27..17)
CSR8.16
CSR8.(15..0)
Symbol
OCO
FOC
MFO
MFC
Function
Overflow counter overflow (read-only)
Gets set when the FIFO overflow counter overflows.
Resets when the high byte (bits 31:24) is read.
FIFO overflow counter (read-only)
Counts the number of frames not accepted due to the receive FIFO overflow.
The counter resets when the high byte (bits 31:24) is read.
Missed frame overflow
Set when a missed frame counter overflows.
The counter resets when the high byte (bits 31:24) is read.
Missed frame counter (read-only)
Counts the number of frames not accepted due to the unavailability of the receive
descriptor.
The counter resets when the high byte (bits 31:24) is read. The missed frame counter
increments when the internal frame cache is full and the descriptors are not available.
Table 4-23 · MII Management and Serial ROM Interface Register (CSR9)
Bits 31:24
Bits 23:16
MDI
MDEN
MDO
MDC
Bits 15:8
Bits 7:0
SDO
SDI
SCLK
SCS
Note:
The CSR9 register has unimplemented bits (shaded). If these bits are read they will return a predefined value. Writing to
these bits has no effect.
Table 4-24 · MII Management and Serial ROM Register Bit Functions
38
Bit
CSR9.19
CSR9.18
CSR9.17
CSR9.16
Symbol
MDI
MDEN
MDO
MDC
Function
MII management data in signal (read-only)
This bit reflects the sample on the mdi port during the read operation on the MII
management interface.
MII management operation mode
1 – Indicates that Core10100 reads the MII PHY registers
0 – Indicates that Core10100 writes to the MII PHY registers
This register bit directly drives the top-level MDEN pin. It is intended to be the active low
tristate enable for the MDIO data output.
MII management write data
The value of this bit drives the mdo port when a write operation is performed.
MII management clock
The value of this bit drives the mdc port.
v4.0
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