Motorola MCF5281 사용자 설명서

17-28

MOTOROLA

 

ECR is a read/write user register, though both fields in this register may be altered by
hardware as well. The ECR is used to enable/disable the FEC.

31

25

24

23

16

Field

—

X_DES_ACTIVE

—

Reset

0000_0000_0000_0000

R/W

R/W

15

0

Field

—

Reset

0000_0000_0000_0000

R/W

R/W

Address

IPSBAR + 0x1014

31–25

—

Reserved, should be cleared.

24

X_DES_ACTIVE Set to one when this register is written, regardless of the value written. 

Cleared by the FEC device whenever no additional “ready” descriptors 
remain in the transmit ring. Also cleared when ECR[ETHER_EN] is 
cleared.

23–0

—

Reserved, should be cleared.

31

16

Field

—

Reset

1111_0000_0000_0000

R/W

R/W

15

1

0

Field

—

ETHER_EN RESET

Reset

0000_0000_0000_0000

R/W

R/W

Address

IPSBAR + 0x1024