PIC18F452-I/ML【PDF 26/134 页】IC MCU FLASH 16KX16 A/D 44QFN

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Sheet目录3813

22页 23页 24页 25页 [26页]27页 28页 29页 30页

Micrel, Inc.

KSZ8864RMN

April 2012

M9999-043012-1.5

Pin Description (Continued)

Pin Number

Pin Name

Type

(1)

Port

Pin Function

(2)

MAC4 Switch SW4-MII enabled with PHY mode or MAC mode, have to configure

SCONF1 Pin 47 with SCONF0 Pin 48 together.

See pins configuration table below:

Pin# (47,48)

Port 4 Switch MAC4

SW4- MII

00 (Default)

SW4-MII PHY mode

Disabled

SCONF1

IPD

SW4-MII MAC mode

SCONF0

IPD

Port 4 Switch SW4-MII enabled with PHY mode or MAC mode, have to configure

SCONF0 pin 48 with SCONF1 Pin 47 together.

See Pin 47 description.

P2LED1

IPU/O

LED indicator for Port 2.

This pin has to be pulled down by 1K resistor in the design for KSZ8864RMN.

P2LED0

IPU/O

LED indicator for Port 2.

Strap option: Switch MAC3 used only.

PU (default) = Select MII interface for the Switch MAC3 SW3-MII.

PD = Select RMII interface for the Switch MAC3 SW3-RMII.

P1LED1

IPU/O

LED indicator for Port 1.

Strap option: Switch RMII used only.

PU (default) = Select the device as clock mode, when use RMII interface, all

clock source come from pin x1/x2 crystal 25MHz.

PD = Select the device as normal mode when use RMII interface. All clock

source comes from SW4-RMII SM4TXC pin with an external input 50MHz clock.

In the normal mode, the 25MHz crystal clock from pin X1/X2 doesn’t take affect

and should disable SW4-RMII SW4RXC 50MHz clock output by the register 87.

The normal mode is used when SW4-RMII receive an external 50MHz RMII

reference clock from pin SM4TXC.

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