参数资料
型号: CORE10/100-RM
厂商: Microsemi SoC
文件页数: 31/106页
文件大小: 0K
描述: IP CORE10/100 ETHERNET MAC
标准包装: 1
系列: *
Core10100 v4.0
Table 4-14 · Status Register Bit Functions
Register Maps
Bit
CSR5.(22..20)
CSR5.(19..17)
CSR5.16
CSR5.15
Symbol
TS
RS
NIS
AIS
Function
Transmit process state (read-only)
Indicates the current state of a transmit process:
000 – Stopped; RESET or STOP TRANSMIT command issued
001 – Running, fetching the transmit descriptor
010 – Running, waiting for end of transmission
011 – Running, transferring data buffer from host memory to FIFO
100 – Reserved
101 – Running, setup packet
110 – Suspended; FIFO underflow or unavailable descriptor
111 – Running, closing transmit descriptor
Receive process state (read-only)
Indicates the current state of a receive process:
000 – Stopped; RESET or STOP RECEIVE command issued
001 – Running, fetching the receive descriptor
010 – Running, waiting for the end-of-receive packet before prefetch of the next
descriptor
011 – Running, waiting for the receive packet
100 – Suspended, unavailable receive buffer
101 – Running, closing the receive descriptor
110 – Reserved
111 – Running, transferring data from FIFO to host memory
Normal interrupt summary
This bit is a logical OR of the following bits:
CSR5.0 – Transmit interrupt
CSR5.2 – Transmit buffer unavailable
CSR5.6 – Receive interrupt
CSR5.11 – General-purpose timer overflow
CSR5.14 – Early receive interrupt
Only the unmasked bits affect the normal interrupt summary bit.
The user can clear this bit by writing a 1. Writing a 0 has no effect.
Abnormal interrupt summary
This bit is a logical OR of the following bits:
CSR5.1 – Transmit process stopped
CSR5.5 – Transmit underflow
CSR5.7 – Receive buffer unavailable
CSR5.8 – Receive process stopped
CSR5.10 – Early transmit interrupt
Only the unmasked bits affect the abnormal interrupt summary bit. The user can clear
this bit by writing a 1. Writing a 0 has no effect.
v4.0
31
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