參數(shù)資料
型號(hào)： AX88195P
廠(chǎng)商： ASIX Electronics Corporation
英文描述： 10/100BASE Local CPU Bus Fast Ethernet MAC Controller
中文描述： 一個(gè)10/100Base本地CPU總線(xiàn)快速以太網(wǎng)MAC控制器
文件頁(yè)數(shù)： 17/37頁(yè)
文件大?。?/td> 414K
代理商： AX88195P
ASIX ELECTRONICS CORPORATION
17
AX88195 Local CPU Bus Fast Ethernet MAC Controller
4.1 Command Register (CR) Offset 00H (Read/Write)
FIELD
NAME
7:6
PS1,PS0 PS1,PS0 : Page Select
The two bit selects which register page is to be accessed.
PS1 PS0
0
0 page 0
0
1 page 1
5:3
RD2,RD1
,RD0
These three encoded bits control operation of the Remote DMA channel. RD2 could be set
to abort any Remote DMA command in process. RD2 is reset by AX88195 when a Remote
DMA has been completed. The Remote Byte Count should be cleared when a Remote DMA
has been aborted. The Remote Start Address are not restored to the starting address if the
Remote DMA is aborted.
DESCRIPTION
RD2,RD1,RD0 : Remote DMA Command
RD2 RD1 RD0
0 0 0 Not allowed
0 0 1 Remote Read
0 1 0 Remote Write
0 1 1 Not allowed
1 X X Abort / Complete Remote DMA
TXP : Transmit Packet
This bit could be set to initiate transmission of a packet
START START :
This bit is used to active AX88195 operation.
STOP
STOP : Stop AX88195
This bit is used to stop the AX88195 operation.
2
TXP
1
0
4.2 Interrupt Status Register (ISR) Offset 07H (Read/Write)
FIELD
NAME
7
RST
Reset Status :
Set when AX88195 enters reset state and cleared when a start command is issued to the
CR. Writing to this bit is no effect.
6
RDC
Remote DMA Complete
Set when remote DMA operation has been completed
5
CNT
Counter Overflow
Set when MSB of one or more of the Tally Counters has been set.
4
OVW
OVERWRITE : Set when receive buffer ring storage resources have been exhausted.
3
TXE
Transmit Error
Set when packet transmitted with one or more of the following errors
n
Excessive collisions
n
FIFO Underrun
2
RXE
Receive Error
Indicates that a packet was received with one or more of the following errors
CRC error
Frame Alignment Error
FIFO Overrun
Missed Packet
1
PTX
Packet Transmitted
Indicates packet transmitted with no error
0
PRX
Packet Received
Indicates packet received with no error.
DESCRIPTION
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