RTL8029AS Ver la hoja de datos (PDF) - Unspecified
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RTL8029AS Datasheet PDF : 41 Pages
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RTL8029AS Preliminary
Bit
Symbol
7, 6 PS1, PS0
PS1 PS0
0
0
0
1
1
0
1
1
Description
Register Page
0
1
2
3
Remark
NE2000 compatible
NE2000 compatible
NE2000 compatible
RTL8029AS
Configuration
5-3 RD2-0
RD2
RD1
RD0
Function
0
0
0
Not allowed
0
0
1
Remote Read
0
1
0
Remote Write
0
1
1
Send Packet
1
*
*
Abort/Complete remote DMA
2
TXP
1
STA
0
STP
This bit must be set to transmit a packet. It is internally reset either after the
transmission is completed or aborted. Writing a 0 has no effect.
The STA bit controls nothing. It only reflects the value written to this bit.
POWER UP=0.
This bit is the STOP command. When it is set, no packets will be received or
transmitted. POWER UP=1.
STA
STP
Function
1
0
Start Command
0
1
Stop Command
ISR: Interrupt Status Register (07H; Type=R/W in Page0)
This register reflects the NIC status. The host reads it to determine the cause of an interrupt.
Individual bits are cleared by writing a "1" into the corresponding bit. It must be cleared after
power up.
Bit
Symbol
Description
7
RST
This bit is set when NIC enters reset state and is cleared when a start command is
issued to the CR. It is also set when receive buffer overflows and is cleared when
one or more packets have been read from the buffer.
6
RDC Set when remote DMA operation has been completed.
5
CNT Set when MSB of one or more of the network tally counters has been set.
4
OVW This bit is set when the receive buffer has been exhausted.
3
TXE Transmit error bit is set when a packet transmission is aborted due to excessive
collisions.
2
RXE This bit is set when a packet received with one or more of the following errors:
- CRC error
- Frame alignment error
- Missed packet
1
PTX
This bit indicates packet transmitted with no errors.
0
PRX
This bit indicates packet received with no errors.
LS009.0
13
1997.01.16
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