dm9302 Davicom Semiconductor, Inc., dm9302 Datasheet - Page 32

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

6.45 VLAN Priority Map Registers (D0H~D1H)
Define the 3-bit of priority field VALN mapping to 2-bit priority queue number.
Reg. D0H:
Reg. D1H:
6.46 Memory Data Pre-Fetch Read Command without Address Increment Register (F0H)
6.47 Memory Data Read Command with Address Increment Register (F2H)
When register FFH bit 7 is “0”, register F5H value will be returned to 0000H, if 16K-byte boundary is reached.
When register FFH bit 7 is “1”, register F5H value will be returned to 0000H, if processor port receive memory byte boundary
address RX memory size, defined in register 3FH with default 1F00H, is reached.
6.48 Memory Data Read Address Register (F4H)
When register FFH bit 7 is “0”, register F5H and F4H can be used as memory byte address to read internal 64K-byte memory.
When register FFH bit 7 is “1”, register F5H and F4H can be used as processor port receive memory byte address with
memory space range from 0 to (RX memory size - 1), defined in register 3FH with default 1EFFH.
6.49 Memory Data Read Address Register (F5H)
6.50 Memory Data Write Command without Address Increment Register (F6H)
32
7:6
5:4
3:2
1:0
7:6
5:4
3:2
1:0
Bit
Bit
7:0
7:0
7:0
7:0
7:0
Bit
Bit
Bit
Bit
Bit
MDRAH50
MWCMDX
MRCMDX
MRCMD
MDRAL
Name
Name
Name
Name
Name
Name
Name
TAG3
TAG2
TAG1
TAG0
TAG7
TAG6
TAG5
TAG4
PHS0,RW Memory Data Read Address Low Byte[7:0]
PHS0,RW Memory Data Read Byte Address High Byte[15:8]
Default
Default
Default
Default
Default
PE1,RW
PE1,RW
PE0,RW
PE0,RW
PE3,RW
PE3,RW
PE2,RW
PE2,RW
X,WO
X,RO
X,RO
Default
Default
10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus
Read data from RX SRAM. After the read of this command, the read pointer of
internal SRAM is unchanged. And the DM9302 starts to pre-fetch the SRAM data
to internal data buffers.
Read data from RX SRAM. After the read of this command, the read pointer is
increased by 1,2, or 4, depends on the operator mode (8-bit,16-bit and 32-bit
respectively)
Write data to TX SRAM. After the write of this command, the write pointer is
unchanged
VLAN priority tag value = 03H
VLAN priority tag value = 02H
VLAN priority tag value = 01H
VLAN priority tag value = 00H
VLAN priority tag value = 07H
VLAN priority tag value = 06H
VLAN priority tag value = 05H
VLAN priority tag value = 04H
Description
Description
Description
Description
Description
Description
Description
DM9302
Preliminary datasheet
DM9302-15-DS-P01
July 30, 2009