dm9302 Davicom Semiconductor, Inc., dm9302 Datasheet - Page 22

• Manufacturer Part Number: dm9302
• Description: 10/100mbps Ethernet Fiber/twisted Pair Media Converter With Local Bus
• Manufacturer: Davicom Semiconductor, Inc.

6.24 TX/RX Memory Size Control Register (3FH)
6.25 Switch Control Register (52H)
6.26 VLAN Control Register (53H)
22
7
6
5
4:3
2
1:0
7:6
5:0
Bit
Bit
Bit
7
6
5
4
3
2
1
0
RST_SW
RST_ANLG
SNF_PORT
CRC_DIS
RESERVED
MEM_BIST
UNICAST
Reserved
TX_SIZE
Name
VIDFF
Name
Name
TOS6
VLAN
VID1
VID0
AGE
PRI
PH0,RO
P0,RW
P0,RW
PE00,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
PE0,RW
P20h,RW
PS0,RO
Default
Default
Default
0,RO
10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus
Address Memory Test BIST Status
0: OK
1: Fail
Reset Switch Core and auto clear after 10us
Reset Analog PHY Core and auto clear after 10us
Sniffer Port Number
Define the port number to act as the sniffer port
CRC Checking Disable
When set, the received CRC error packet also accepts to receive memory.
Aging
00: no aging
01: 64 ± 32 sec
10: 128 ± 64 sec
11: 256 ±128 sec
Full ToS Using Enable
1: check most significant 6-bit of TOS
0: check most significant 3-bit only of TOS
Reserved
Unicast packet can across VLAN boundary
Replace VIDFF
If the received packet is a tagged VLAN with VID equal to “FFF”, its VLAN field is
replaced with VLAN tag defined in Reg. 6EH and 6FH.
Replace VID01
If the received packet is a tagged VLAN with VID equal to “001”, its VLAN field is
replaced with VLAN tag defined in Reg. 6EH and 6FH.
Replace VID0
If the received packet is a tagged VLAN with VID equal to “000”, its VLAN field is
replaced with VLAN tag defined in Reg. 6EH and 6FH.
Replace priority field in the tag with value define in Reg 6FH bit 7~5.
VLAN mode enable
1: 802.1Q base VLAN mode enable
0: port-base VLAN only
Reserved
TX Block Size in 2-Port Mode
This value defines the transmit block size in 256-byte unit.
TX memory size = TX_SIZE * 256 bytes
And then
RX memory size = 16KB – (TX_SIZE + 1)*256-Byte
Note: The value of TX_SIZE should be between 14H and 30H
Description
Description
Description
DM9302
Preliminary datasheet
DM9302-15-DS-P01
July 30, 2009