dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 20

• Manufacturer Part Number: dm9000b
• Description: Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

6.19 General purpose Register ( 1FH ) ( For 8 Bit mode only, for 16 bit mode, see reg . 34H)
6.20 TX SRAM Read Pointer Address Register (22H~23H)
6.21 RX SRAM Write Pointer Address Register (24H~25H)
6.22 Vendor ID Register (28H~29H)
6.23 Product ID Register (2AH~2BH)
6.24 Chip Revision Register (2CH)
6.25 Transmit Control Register 2 ( 2DH )
Final
Version: DM9000B-13-DS-F02
June 4, 2009
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
Bit
Bit
Bit
Bit
Bit
Bit
6-4
3:1
Bit
7
7
0
RESERVED
RWPAH
RWPAL
TRPAH
TRPAL
CHIPR
Name
Name
Name
Name
Name
VIDH
PIDH
PHYPD
VIDL
PIDL
Name
Name
GPIO
GPO
LED
PS,0CH,RO
PS,00H.RO
P,1AH,RO
PE,0AH,RO
PE,46H.RO
PE,90H,RO
PE,00H.RO
PS0,RO
PS0.RO
Default
Default
Default
ET1,WO
Default
Default
Default
P0,RW
P0,RW
Default
P0,RW
0,RO
Reserved
General Purpose Output 6~4 (in 8-bit mode)
These bits are reflect to pin GP6~4 respectively.
General Purpose (in 8-bit mode)
When the correspondent bit of General Purpose Control Register is 1, the value of
the bit is reflected to pin GP3~1 respectively.
When the correspondent bit of General Purpose Control Register is 0, the value of
the bit to be read is reflected from correspondent pins of GP3~1 respectively.
PHY Power Down Control
1: power down PHY
0: power up PHY
*If this bit is updated from ‘1’ to ‘0’, the whole MAC Registers can not be accessed
within 1ms.
RX SRAM Write Pointer Address High Byte (25H)
RX SRAM Write Pointer Address Low Byte (24H)
CHIP Revision
Led Mode
When set, the LED pins act as led mode 1.
When cleared, the led mode is default mode 0 or depending EEPROM setting.
TX SRAM Read Pointer Address High Byte (23H)
TX SRAM Read Pointer Address Low Byte (22H)
Vendor ID High Byte (29H)
Vendor ID Low Byte (28H)
Product ID High Byte (2BH)
Product ID Low Byte (2AH)
Ethernet Controller with General Processor Interface
Description
Description
Description
Description
Description
Description
Description
DM9000B
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