AX88780_07 ASIX [ASIX Electronics Corporation], AX88780_07 Datasheet - Page 20

• Manufacturer Part Number: AX88780_07
• Description: High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller
• Manufacturer: ASIX [ASIX Electronics Corporation]

4.4 TX_CFG--TX Configuration Register
Offset Address = 0xFC10
31:7
6
5
4
3:2
1:0
4.5 TX_CMD--TX Command Register
Offset Address = 0xFC14
Field
31:16
15
14:13
12
11:0
4.6 TXBS--TX Buffer Status Register
Offset Address = 0xFC18
31:4
8
7:6
5:4
3
Field Name
Field Name
TXCRCAP
TXCHKSUM
TXDS
Name
HWI
TXDP
DATALEN
INTXDS
TXDUSE
TXD3O
-
-
-
-
-
-
-
Type
R
R
R
R
R/W
Type
R
R/W
R/W
R/W
R/W
Type
R
R/W
R/W
R/W
R
R
All 0’s
0
00
00
0
Default
Default
All 0’s
0
00
0
All 0’s
Default
All 0’s
1
0
0
00
00
Description
Reserved
Internal TX descriptor status.
This bit reports the TX descriptor status. When there is data to be transmitted,
this bit will be set to ‘1’ otherwise it will be ‘0’
1 = have data in TX buffer
0 = all data are transmitted to cable
Reserved
TX Descriptor In Transmitting
These status bits indicate which descriptor is transmitting now.
00: Descriptor 0 in transmitting
01: Descriptor 1 in transmitting
10: Descriptor 2 in transmitting
11: Descriptor 3 in transmitting
TX Descriptor 3 Occupied
Driver set this bit to ‘1’ to indicate that it had used TX descriptor3. When the
Default = 0x0000_0000
Reserved
Host Writes Indication
Before host begins to send a packet to TX buffer, this bit should be set. At
the end of host writes the packet, this bit should be cleared.
1 = Start Writing
0 = End Writing
TX Descriptor Pointer
To specify which TX descriptor to be written.
Reserved
Byte Count.
Data length is written to transmitted buffer.
Default = 0x0000_0040
Default = 0x0000_0000
Reserved
TXCRC Auto-Append
When this bit is enabled, AX88780 will append CRC to the transmitted
packet in FCS field.
1 = enable
0 = disable
Reserved.
TX Checksum Generation
When this bit is enabled, AX88780 will append checksum to the transmitted
packet that is IP or TCP or UDP packet.
1 = enable
0 = disable
Reserved
TX Description Status
AX88780 reports which descriptor is transmitted now
Default: 00
20
Description
ASIX ELECTRONICS CORPORATION
Description
AX88780