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DM9000B 데이터시트(PDF) 11 Page - Davicom Semiconductor, Inc.

부품명 DM9000B
상세설명  Ethernet Controller With General Processor Interface
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제조업체  DAVICOM [Davicom Semiconductor, Inc.]
홈페이지  http://www.davicom.com.tw
Logo DAVICOM - Davicom Semiconductor, Inc.

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DM9000B
Ethernet Controller with General Processor Interface
Final
11
Version: DM9000B-13-DS-F03
March 5, 2012
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
I/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.
38
LED2
I/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 WAKE defined in EEPROM setting in 16-bit mode.
The LED2 (Link/ACT) function is disabled while the Pin38 supports WOL
function.
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
Band gap Ground
1
BGRES
I/O
Band gap Pin
2
RXVDD18
P
1.8V power output for TP RX
9
TXVDD18
P
1.8V power output for TP TX


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