TWR-K60N512-KEIL Freescale Semiconductor, TWR-K60N512-KEIL Datasheet - Page 115

• Manufacturer Part Number: TWR-K60N512-KEIL
• Description: K60N512 Keil Tower Kit
• Manufacturer: Freescale Semiconductor
• Series: Kinetisr
• Type: MCUr

Specifications of TWR-K60N512-KEIL

• Rohs Compliant: YES
• Contents: 4 Boards, Documentation, DVD
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Freescale Tower System, K60N512

Chapter 12 ENET Module
/* Poll for the MII interrupt (interrupt should be masked) */
for (timeout = 0; timeout < MII_TIMEOUT; timeout++)
{
if (ENET_EIR/*(ch)*/ & ENET_EIR_MII_MASK)
break;
}
if(timeout == MII_TIMEOUT)
return 1;
/* Clear the MII interrupt bit */
ENET_EIR/*(ch)*/ = ENET_EIR_MII_MASK;
return 0;
}
/********************************************************************/
int
mii_read(int ch, int phy_addr, int reg_addr, int *data)
{
int timeout;
/* Clear the MII interrupt bit */
ENET_EIR/*(ch)*/ = ENET_EIR_MII_MASK;
/* Initiatate the MII Management read */
ENET_MMFR/*(ch)*/ = 0
| ENET_MMFR_ST(0x01)
| ENET_MMFR_OP(0x2)
| ENET_MMFR_PA(phy_addr)
| ENET_MMFR_RA(reg_addr)
| ENET_MMFR_TA(0x02);
/* Poll for the MII interrupt (interrupt should be masked) */
for (timeout = 0; timeout < MII_TIMEOUT; timeout++)
{
if (ENET_EIR/*(ch)*/ & ENET_EIR_MII_MASK)
break;
}
if(timeout == MII_TIMEOUT)
return 1;
/* Clear the MII interrupt bit */
ENET_EIR/*(ch)*/ = ENET_EIR_MII_MASK;
*data = ENET_MMFR/*(ch)*/ & 0x0000FFFF;
return 0;
}
12.4 MII mode
The media independent interface (MII) is a configuration mode that requires 18 signals to
communicate to a generic PHY. The MII operates at 25 MHz. The synchronization
signals are part of the MII external signals provided by the Ethernet PHY.
Kinetis Quick Reference User Guide, Rev. 0, 11/2010
Freescale Semiconductor
115