Fec Receive Fifo Read Pointer Register (Fecrfrp) - Freescale Semiconductor MCF5480 Reference Manual

31 30
R 0 0
W
Reset 0 0
15 14
R 0 0
W
Reset 0 0
Reg
Addr
Bits Name
31–10 —
9–0 ALARM

30.3.3.24 FEC Receive FIFO Read Pointer Register (FECRFRP)

The read pointer is a FIFO maintained pointer which points to the next FIFO location to be read. The read
pointer can be both read and written. This ability facilitates the debug of the FIFO controller and peripheral
drivers.
31 30
R 0 0
W
Reset 0 0
15 14
R 0 0
W
Reset 0 0
Reg
Addr
Figure 30-27. FEC Receive FIFO Read Pointer Register (FECRFRP)
30-32
29 28 27 26
0 0 0 0
0 0 0 0
13 12 11 10
0 0 0 0
0 0 0 0
MBAR + 0x9198 (FEC0), 0x9998 (FEC1)
Figure 30-26. FEC Receive FIFO Alarm Register (FECRFAR)
Table 30-30. FECRFAR Field Descriptions
Reserved, should be cleared.
Alarm pointer. This pointer indicates the point at which to set the FIFO alarm bit. This value
is compared with the number of free bytes in the FIFO.
29 28 27 26
0 0 0 0
0 0 0 0
13 12 11 10
0 0 0 0
0 0 0 0
MBAR + 0x919C (FEC0), 0x999C (FEC1)
MCF548x Reference Manual, Rev. 3
25 24 23 22
0 0 0 0
0 0 0 0
9 8 7 6
0 0 0 0
Descriptions
25 24 23 22
0 0 0 0
0 0 0 0
9 8 7 6
0 0 0 0
21 20 19 18
0 0 0 0
0 0 0 0
5 4 3 2
ALARM
0 0 0 0
21 20 19 18
0 0 0 0
0 0 0 0
5 4 3 2
READ
0 0 0 0
Freescale Semiconductor
17 16
0 0
0 0
1 0
0 0
17 16
0 0
0 0
1 0
0 0