RTL8305NB
Datasheet
Single-Chip 5-Port 10/100Mbps Ethernet Switch Controller
iii Track ID: JATR-3375-16 Rev. 1.0
Table of Contents
1.
GENERAL DESCRIPTION..............................................................................................................................................1
2.
FEATURES.........................................................................................................................................................................2
3.
SYSTEM APPLICATIONS...............................................................................................................................................3
4.
BLOCK DIAGRAM...........................................................................................................................................................4
5.
PIN ASSIGNMENTS .........................................................................................................................................................5
5.1.
P
IN
A
SSIGNMENTS
D
IAGRAM
.......................................................................................................................................5
5.2.
P
ACKAGE
I
DENTIFICATION
...........................................................................................................................................5
5.3.
P
IN
A
SSIGNMENTS
T
ABLE
............................................................................................................................................6
6.
PIN DESCRIPTIONS.........................................................................................................................................................7
6.1.
P
IN
A
SSIGNMENT
C
ODES
.............................................................................................................................................7
6.2.
M
EDIA
C
ONNECTION
P
INS
...........................................................................................................................................7
6.3.
M
ISCELLANEOUS
P
INS
.................................................................................................................................................8
6.4.
P
ORT
LED
P
INS
...........................................................................................................................................................8
6.5.
S
TRAPPING
P
INS
...........................................................................................................................................................9
6.6.
R
EGULATOR
P
INS
.........................................................................................................................................................9
6.7.
P
OWER AND
GND
P
INS
................................................................................................................................................9
7.
BASIC FUNCTION DESCRIPTIONS ...........................................................................................................................10
7.1.
S
WITCH
C
ORE
F
UNCTION
O
VERVIEW
.........................................................................................................................10
7.1.1.
Flow Control ........................................................................................................................................................10
7.1.1.1
IEEE 802.3x Full Duplex Flow Control........................................................................................................................10
7.1.1.2
Half Duplex Back Pressure...........................................................................................................................................10
7.1.2.
Address Search, Learning, and Aging ..................................................................................................................11
7.1.3.
Half Duplex Operation .........................................................................................................................................11
7.1.4.
InterFrame Gap....................................................................................................................................................11
7.1.5.
Illegal Frame........................................................................................................................................................11
7.2.
P
HYSICAL
L
AYER
F
UNCTIONAL
O
VERVIEW
...............................................................................................................12
7.2.1.
Auto-Negotiation ..................................................................................................................................................12
7.2.2.
10Base-T Transmit Function ................................................................................................................................12
7.2.3.
10Base-T Receive Function ..................................................................................................................................12
7.2.4.
Link Monitor.........................................................................................................................................................12
7.2.5.
100Base-TX Transmit Function............................................................................................................................12
7.2.6.
100Base-TX Receive Function..............................................................................................................................12
7.2.7.
Power-Down Mode...............................................................................................................................................13
7.2.8.
Crossover Detection and Auto Correction ...........................................................................................................13
7.2.9.
Polarity Detection and Correction .......................................................................................................................13
7.3.
G
ENERAL
F
UNCTION
O
VERVIEW
................................................................................................................................14
7.3.1.
Power-On Sequence .............................................................................................................................................14
7.3.2.
Setup and Configuration.......................................................................................................................................15
7.3.3.
Serial EEPROM Example.....................................................................................................................................16
7.3.3.1
EEPROM Device Operation .........................................................................................................................................16
7.3.3.2 EEPROM Size Selection...............................................................................................................................................18
7.3.4.
SMI .......................................................................................................................................................................18
7.3.5.
Head-Of-Line Blocking ........................................................................................................................................18
7.3.6.
Filtering/Forwarding Reserved Control Frame...................................................................................................19
7.3.7.
Loop Detection .....................................................................................................................................................19
7.3.8.
Reg.0.14 PHY Digital Loopback Return to Internal.............................................................................................21
7.3.9.
LDO for 1.0V Power Generation .........................................................................................................................22
7.3.10.
Crystal/Oscillator ............................................................................................................................................22
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