RTL8305S Ver la hoja de datos (PDF) - Realtek Semiconductor

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RTL8305S

5-PORT 10/100 MBPS SINGLE CHIP SWITCH CONTROLLER

Realtek Semiconductor 

RTL8305S

The other active-low input pin is P4FLCTRL#, which determines if flow control algorithm is enabled through the MII port.

(default P4FLCTRL#=1 )

If P4FLCTRL#=0 and P4DPXSTA#=0, 802.3x flow control packets will flow through the MII port.

If P4FLCTRL#=0 and P4DPXSTA#=1, a back-pressure algorithm will be implemented through the MII port.

If P4FLCTRL#=1, no flow control algorithm is performed on the MII port.

All three input pins, P4DPXSTA#, P4SPDSTA#, and P4FLCTRL#, have no effect when P4LNKSTA#=1.

It is important to note that the MRXD[3:0] pins in MII/SNI PHY mode are MTXD[3:0] for MII MAC mode, and vice versa.

Also the same for pin MRXDV vs. MTXEN, and pin MRXC vs. MTXC.

NOTE: There are no MRXER, MTXER, MCRS and SMI (MDC/MDIO) pins for MII signaling. Because of the absence of

MCRS, system designers can wire MRXDV directly to CRS and RXDV of the opposite chip.

R TL8305S

x

Floating=High

P4Mode[1]

x

Floating=High

P4Mode[0]

x

Floating=High

P4LnkSta#

x

Floating=High

P4SpdSta#

x

Floating=High

P4DupSta#

x

Floating=High

P4FlCtrl#

x

Floating=High

EnP4Led

x

Not Used

SelMiiMac#

59 MRXC/MTXC

60 MRXDV/MTXEN

67~61 MRXD[3:0]/MTXD[3:0]

4

51 MTXC/MRXC

52 MTXEN/MRXDV

57-54 MTXD[3:0]/MRXD[3:0]

4

58 COL

A llshould be floating

5 UTP Mode (Default five port switch application)

For general cases, most of the option pins should be floating (=High=Enable), except EnBrdCtrl. This means that EnBrdCtrl

should be pulled down (=Low=Disable) for normal applications.

2002/02/19

14

Rev. 1.2

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