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參數(shù)資料
| 型號(hào)： | RTL8308B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | REALTEK SINGLE CHIP 8-PORT 10/100 ETHERNET SWITCH CONTROLLER WITH EMBEDDED MEMORY |
| 中文描述： | 瑞昱單片8端口10/100以太網(wǎng)交換機(jī)控制器，嵌入式存儲(chǔ)器 |
| 文件頁數(shù)： | 7/28頁 |
| 文件大?。?/td> | 397K |
| 代理商： | RTL8308B |
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RTL8308B
2002/01/23
Rev. 2.0
7
MDIO
I/O
44
Management Data Input/Output:
This pin is used during the
MII setup process. The whole setup sequence will set Register
4h, address 16-20 of the PHY to 05E1h, REGISTER 0h to
value 1200h. It also advertises 100/10 full duplex with pause
capability & enables auto-negotiation. Sending after reset
signal release about 1.6ms.
This pin is Tri-state at reset.
5.2 Serial EEPROM 24LC02 Interface
Symbol
SCLK
Type
O
Pin No
121
Description
Serial Clock:
Internally pulled high, this pin is used to enable
data transfers from the EEPROM to the controller.
This output is used to clock the serial EEPROM inputs and
outputs. It operates at 1.6us or 625KHz.
Serial Data Input/Output:
Internally pulled high, this pin is
used to obtain configuration data from the external serial
EEPROM after reset. The data is synchronized by MDC.
SDA
I/O
122
5.3 System Pins
Symbol
RST#
Type
I
Pin No
53
Description
Reset:
Active low to a known reset state. After power-on reset
(low to high), the configuration modes from Mode Pins are
determined. Then, the contents of the serial EEPROM is
auto-loaded into and the RTL8308B, which begins to access
the management data of PHY devices.
System clock input:
The same 50 MHz clock as REFCLK is
used.
SYSCLK
I
119
5.4 Mode Pins (Reset-Read)
Symbol
ENBrdCtrl
Type
I
Pin No
108
Description
Enable Broadcast Storm Control detection:
Pulled low
internally by default, Broadcast Storm Control is disabled. When
pulled high upon reset, Broadcast Storm Control is enabled.
Enable Cut-through:
Pulled low internally by default,
cut-through is disabled. When pulled high upon reset,
Cut-through is enabled.
Enable Half duplex back pressure function:
Pulled low
internally by default, back pressure is enabled. When pulled
low upon reset, back pressure is disabled.
Enable Full Duplex Flow Control:
Pulled low internally by
default, Flow Control is enabled. The flow control ability will
write to management register 4 of PHY device one and only
one time after power-on reset, for advertising. When pulled
low upon reset, the flow control function will be disabled.
ENCUTHR
I
117
ENBKPRS
I
107
ENFCTRL
I
112
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