dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 10

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

5. Pin Description
5.1 Processor Interface
5.1.1 8-bit mode pins
Final
Version: DM9000B-13-DS-F02
June 4, 2009
18,17,16,
14,13,12,
31,29,28,
27,26,25,
25,26,27
Pin No.
Pin No.
24,22
11,10
35
36
37
32
34
22
24
I = Input
# = asserted low
Pin Name
Pin Name
SD8~15
SD0~7
GP6~4
WAKE
IOW#
LED3
IOR#
CMD
CS#
INT
O = Output
I/O,PD
I/O,PD
O,PD
O,PD Issue a wake up signal when wake up event happens
O,PD
O,PD
Type
Type
I,PD
I,PD
I,PD
I,PD
Processor Read Command
This pin is low active at default, its polarity can be modified by EEPROM
setting. See the EEPROM content description for detail
Processor Write Command
This pin is low active at default, its polarity can be modified by EEPROM
setting. See the EEPROM content description for detail
Chip Select
A default low active signal used to select the DM9000B. Its polarity can be
modified by EEPROM setting. See the EEPROM content description for
detail.
Command Type
When high, the access of this command cycle is DATA port
When low, the access of this command cycle is INDEX port
Interrupt Request
This pin is high active at default, its polarity can be modified by EEPROM
setting or by strap pin EECK. See the EEPROM content description for
detail
Processor Data Bus bit 0~7
Processor Data Bus bit 8~15
In 16-bit mode, these pins act as the processor data bus bit 8~15;
When EECS pin is pulled high , they have other definitions. See 8-bit
mode pin description for details.
Full-duplex LED
In LED mode 1, Its low output indicates that the internal PHY is operated
in full-duplex mode, or it is floating for the half-duplex mode of the internal
PHY
In LED mode 0, Its low output indicates that the internal PHY is operated
in 10M mode, or it is floating for the 100M mode of the internal PHY
Note: LED mode is defined in EEPROM setting.
General Purpose output pins:
These pins are output only for general purpose that is configured by
register 1Fh.
GP6 pin also act as trap pin for the INT output type.
When GP6 is pulled high, the INT is Open-Drain output type;
Otherwise it is force output type.
I/O = Input/Output
PD = internal pull-low about 60K
Ethernet Controller with General Processor Interface
O/D = Open Drain
Description
Description
P = Power
DM9000B
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