參數(shù)資料
型號(hào)： RTL8305SB
英文描述： RTL8305SB
中文描述： RTL8305SB
文件頁數(shù)： 7/66頁
文件大小： 963K
代理商： RTL8305SB
RTL8305SB
2002/04/09
7
Rev.1.0
5. Pin Descriptions
' I ' stands for inputs; 'O' stands for outputs; 'A' stands for analog; 'D' stands for digital
Upon reset:
defined as a short time after at the end of a hardware reset.
After reset:
defined as the time after the specified
"Upon Reset" time.
5.1 Media Connection Pins
Pin Name
RXIP[4:0]
RXIN[4:0]
Pin No. Type
11,12,15,
16,27,28,
31,32
127,128
Description
Differential Receive Data Input:
Shared by 100Base-TX, 10Base-T
and 100Base-FX.
UTP or FX depends on pin GxMode/GyMode/P4Mode[1:0].
Note: The 8305SB uses these pins for UTP and Fiber. The 8305S uses
these pins for UTP only.
Differential Transmit Data
Output:
Shared by 100Base-TX, 10Base-T
and 100Base-FX.
UTP or FX depends on pin GxMode/GyMode/P4Mode[1:0].
Note: The 8305SB uses these pins for UTP and Fiber. The 8305S uses
these pins for UTP only.
Default
AI
TXOP[4:0]
TXON[4:0]
3,4
7,8
19,20
23,24
35,36
AO
5.2 Configuration Pins
Pin Name
ENANEG_BKPRS
Pin No. Type
78
Description
Enable Auto-Negotiation Back Pressure:
This pin sets back pressure
for auto-negotiation mode for all UTP ports.
1: Enable
0: Disable
8305SB=ENANEG_BKPRS, 8305S=ENBKPRS. This pin has the same
function for both the RTL8305SB and RTL8305S. The RTL8305SB also
supports Force mode (through P4ENFC/GxENFC/GyENFC), but this pin
is used only for Auto-Negotiation mode. The pin name is changed to
differentiate between “Enable back pressure for Auto-Negotiation mode”
and “Enable backpressure for Force mode.”
Disable Broadcast Storm Control:
1= Disable
0= Enable
8305SB=DISBRDCTRL, 8305S=ENBRDCTRL. The RTL8305SB will
disable this function when pin DISBRDCTRL is left floating. However, the
RTL8305S will enable this function when pin ENBRDCTRL is left floating.
LED Blink Time:
This pin selects the blinking speed of the activity and
collision LEDs.
1: On 43ms, then Off 43ms
0: On 120ms, then Off 120ms
Enable Reset Blink:
This pin enables the blinking of the LEDs upon
reset for diagnosis purposes.
1: Enable reset LED blinking
0: Disable reset LED blinking
8305SB=EN_RST_BLNK, 8305S=DIS_RST_BLNK#. This pin has the
same function for both the RTL8305SB and RTL8305S. The pin name
has been changed for convenience.
Default
1
I
DISBRDCTRL
80
I
1
LED_BLNK_TIME
89
I
1
EN_RST_BLNK
90
I
1
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