DM9008C View Datasheet(PDF) - Davicom Semiconductor, Inc.
Part Name
Description
MFG CO.
'DM9008C' PDF : 52 Pages View PDF
DM9008C
Ethernet Controller with General Processor Interface
6.18 General purpose control Register ( 1EH ) ( For 8 Bit mode only, for 16 bit mode, see reg . 34H)
Bit
Name
Default
Description
7 RESERVED PH0,RO Reserved
6:4
GPC64
P,
111,RO
General Purpose Control 6~4
Define the input/output direction of pins GP6~4 respectively.
These bits are all forced to “1”s, so pins GP6~4 are output only.
General Purpose Control 3~1
3:1
GPC31
P, Define the input/output direction of pins GP 3~1 respectively.
000,RW When a bit is set 1, the direction of correspondent bit of General Purpose Register
is output. Other defaults are input
0 RESERVED P1,RO Reserved
6.19 General purpose Register ( 1FH ) ( For 8 Bit mode only, for 16 bit mode, see reg . 34H)
Bit
Name
Default
Description
7 RESERVED 0,RO Reserved
6-4
GPO
P0,RW
General Purpose Output 6~4 (in 8-bit mode)
These bits are reflect to pin GP6~4 respectively.
General Purpose (in 8-bit mode)
3:1
GPIO
P0,RW
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
0
PHYPD ET1,WO 1: power down PHY
0: power up PHY
6.20 TX SRAM Read Pointer Address Register (22H~23H)
Bit
Name
Default
Description
7:0 TRPAH PS0,RO TX SRAM Read Pointer Address High Byte (23H)
7:0 TRPAL PS0.RO TX SRAM Read Pointer Address Low Byte (22H)
6.21 RX SRAM Write Pointer Address Register (24H~25H)
Bit
Name
Default
Description
7:0 RWPAH PS,0CH,RO RX SRAM Write Pointer Address High Byte (25H)
7:0 RWPAL PS,00H.RO RX SRAM Write Pointer Address Low Byte (24H)
6.22 Vendor ID Register (28H~29H)
Bit
Name
Default
7:0
VIDH
PE,0AH,RO Vendor ID High Byte (29H)
7:0
VIDL
PE,46H.RO Vendor ID Low Byte (28H)
Description
6.23 Product ID Register (2AH~2BH)
Bit
Name
Default
7:0
PIDH
PE,90H,RO Product ID High Byte (2BH)
7:0
PIDL
PE,00H.RO Product ID Low Byte (2AH)
Description
Preliminary
20
Version: DM9008C-13-DS-P01
January 15, 2008
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