DM9000BI
Industrial-grade Ethernet Controller with General Processor Interface
5. Pin Description
I = Input
O = Output
I/O = Input/Output
O/D = Open Drain
P = Power
# = asserted low
PD = internal pull-low about 60K
5.1 Processor Interface
Pin No.
Pin Name
Type
Description
Processor Read Command
35
IOR#
I,PD 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
36
37
32
IOW#
CS#
I,PD 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 DM9000BI. Its polarity can
be modified by EEPROM setting. See the EEPROM content description
I,PD
for detail.
Command Type
CMD
I,PD 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
34
INT
O,PD
detail
18,17,16,
14,13,12,
11,10
Processor Data Bus bit 0~7
I/O,PD
SD0~7
SD8~15
Processor Data Bus bit 8~15
31,29,28,
27,26,25,
24,22
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
I/O,PD
mode pin description for details.
5.1.1 8-bit mode pins
Pin No.
22
Pin Name
WAKE
Type
Description
Issue a wake up signal when wake up event happens
O,PD
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
24
LED3
O,PD 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.
25,26,27
GP6~4
O,PD
Preliminary
10
Version: DM9000BI-13-DS-P02
January 17, 2008
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
