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DM9000A 데이터시트(PDF) 11 Page - List of Unclassifed Manufacturers

부품명 DM9000A
상세설명  Ethernet Controller with General Processor Interface
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DM9000A
Ethernet Controller with General Processor Interface
Preliminary datasheet
11
Version: DM9000A-DS-P03
Apr. 21, 2005
28,29,31
GP3,GP2,GP1
I/O
General I/O Ports
Registers GPCR and GPR can program these pins
These pins are input ports at default.
5.2 EEPROM Interface
Pin No.
Pin Name
Type
Description
19
EEDIO
I/O,PD IO Data to EEPROM
20
EECK
O,PD
Clock to EEPROM
This pin is also used as the strap pin of the polarity of the INT pin
When this pin is pulled high, the INT pin is low active; otherwise the INT pin is
high active
21
EECS
O,PD
Chip Select to EEPROM
This pin is also used as a strap pin to define the internal memory data
bus width. When it is pulled high, the memory access bus is 8-bit;
Otherwise it is 16-bit.
5.3 Clock Interface
Pin No.
Pin Name
Type
Description
43
X2
O
Crystal 25MHz Out
44
X1
I
Crystal 25MHz In
5.4 LED
Interface
Pin No.
Pin Name
Type
Description
39
LED1
O
Speed LED
Its low output indicates that the internal PHY is operated in 100M/S, or it
is floating for the 10M mode of the internal PHY.
This pin also acts as ISA bus IO16 defined in EEPROM setting in 16-bit
mode.
38
LED2
O
Link / Active LED
In LED mode 1, it is the combined LED of link and carrier sense signal of
the internal PHY
In LED mode 0, it is the LED of the carrier sense signal of the internal
PHY only
This pin also acts as ISA bus IOWAIT or WAKE defined in EEPROM
setting in 16-bit mode.
5.5 10/100 PHY/Fiber
Pin No.
Pin Name
Type
Description
46
SD
I
Fiber-optic Signal Detect
PECL signal, which indicates whether or not the fiber-optic receive pair is
receiving valid levels
48
BGGND
P
Bandgap Ground
1
BGRES
I/O
Bandgap Pin


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