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DM9000

ISA to Ethernet MAC Controller with Integrated 10/100 PHY

Davicom Semiconductor, Inc. 

DM9000

ISA to Ethernet MAC Controller with Integrated 10/100 PHY

6,7,8,9,10,

11,12,13,

SD0~15

I/O Processor Data Bus bit 0~15

89,88,87,

86,85,84,

83,82

93,94,95,

SA4~9

I Address Bus 4~9

96,97,98

These pins are used to select the DM9000.

When SA9 and SA8 are in high states, and SA7 and AEN are in low

states, and SA6~4 are matched with strap pins TXD2~0, the DM9000 is

selected.

92

CMD

I Command Type

When high, the access of this command cycle is DATA port

When low, the access of this command cycle is ADDRESS port

91

IO16

O Word Command Indication

When the access of internal memory is word or dword width, this pin will

be asserted

This pin is low active at default

100

INT

O Interrupt Request

This pin is high active at default, its polarity can be modified by EEPROM

setting or strap pin MDC. See the EEPROM content description for detail

56,53,52, SD16~31 (in

I/O Processor Data Bus bit 16~31

51,50,49, double word

These pins are used as data bus bits 16~31 when the DM9000 is set to

47,46,45,

mode)

double word mode (the straps pin EEDO is pulled high and WAKEUP is

44,43,41,

not pull-high)

40,39,38

37

57 IO32 (in double O Double Word Command Indication

word mode)

This pins is used as the double word command indication when the

DM9000 is set to double data word mode, and this pin will be asserted

when the access of internal memory is double word width

This pin is low active at default

Note: The pins of processor interface except SD8,SD9 and IO16 are all have a pulled down resistor about 60k ohm

internally

5.3 EEPROM Interface

64

EEDI

65

EEDO

66

EECK

67

EECS

I Data from EEPROM

I/O Data to EEPROM

This pin is also used as a strap pin. It combines with strap pin WAKEUP,

and it can set the data width of the internal memory access

The decoder table is the following, where the logic 1 means the strap pin

is pulled high

WAKEUP EEDO data width

0

0

16-bit

0

1

32-bit

1

0

8-bit

1

1

reserved

O Clock to EEPROM

I/O Chip Select to EEPROM

This pin is also used as a strap pin to define the LED modes.

Final

8

Version: DM9000-DS-F03

April 23, 2009

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