RTL8139C Ver la hoja de datos (PDF) - Realtek Semiconductor
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RTL8139C
Realtek Semiconductor
RTL8139C Datasheet PDF : 62 Pages
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RTL8139C(L)
6. Register Descriptions
The RTL8139C(L) provides the following set of operational registers mapped into PCI memory space or I/O space.
Offset
0000h
R/W
R/W
0001h
R/W
0002h
R/W
0003h
R/W
0004h
R/W
0005h
R/W
0006h-0007h
-
0008h
R/W
0009h
R/W
000Ah
R/W
000Bh
R/W
000Ch
R/W
000Dh
R/W
000Eh
R/W
000Fh
R/W
0010h-0013h
R/W
0014h-0017h
R/W
0018h-001Bh
R/W
001Ch-001Fh R/W
0020h-0023h
R/W
0024h-0027h
R/W
0028h-002Bh
R/W
002Ch-002Fh R/W
0030h-0033h
R/W
0034h-0035h
R
0036h
R
0037h
R/W
0038h-0039h
R/W
003Ah-003Bh
R
003Ch-003Dh R/W
003Eh-003Fh
R/W
0040h-0043h
R/W
0044h-0047h
R/W
0048h-004Bh
R/W
004Ch-004Fh R/W
0050h
R/W
0051h
R/W
0052h
R/W
Tag
IDR0
IDR1
IDR2
IDR3
IDR4
IDR5
-
MAR0
MAR1
MAR2
MAR3
MAR4
MAR5
MAR6
MAR7
TSD0
TSD1
TSD2
TSD3
TSAD0
TSAD1
TSAD2
TSAD3
RBSTART
ERBCR
ERSR
CR
CAPR
CBR
IMR
ISR
TCR
RCR
TCTR
MPC
9346CR
CONFIG0
CONFIG1
Description
ID Register 0: The ID registers 0-5 are only permitted to read/write
by 4-byte access. Read access can be byte, word, or double word
access. The initial value is autoloaded from the EEPROM EthernetID
field.
ID Register 1
ID Register 2
ID Register 3
ID Register 4
ID Register 5
Reserved
Multicast Register 0: The MAR registers 0-7 are only permitted to
read/write by 4-byte access. Read access can be byte, word, or double
word access. Driver is responsible for initializing these registers.
Multicast Register 1
Multicast Register 2
Multicast Register 3
Multicast Register 4
Multicast Register 5
Multicast Register 6
Multicast Register 7
Transmit Status of Descriptor 0
Transmit Status of Descriptor 1
Transmit Status of Descriptor 2
Transmit Status of Descriptor 3
Transmit Start Address of Descriptor0
Transmit Start Address of Descriptor1
Transmit Start Address of Descriptor2
Transmit Start Address of Descriptor3
Receive (Rx) Buffer Start Address
Early Receive (Rx) Byte Count Register
Early Rx Status Register
Command Register
Current Address of Packet Read (The initial value is 0FFF0h)
Current Buffer Address: The initial value is 0000h. It reflects total
received byte-count in the rx buffer.
Interrupt Mask Register
Interrupt Status Register
Transmit (Tx) Configuration Register
Receive (Rx) Configuration Register
Timer Count Register: This register contains a 32-bit
general-purpose timer. Writing any value to this 32-bit register will
reset the original timer and begin to count from zero.
Missed Packet Counter: Indicates the number of packets discarded
due to rx FIFO overflow. It is a 24-bit counter. After s/w reset, MPC is
cleared. Only the lower 3 bytes are valid.
When any value is written, MPC will be reset also.
93C46 (93C56) Command Register
Configuration Register 0
Configuration Register 1
2002/01/10
10
Rev.1.4
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