12 rx fifo read pointer register (pcirfrpr), 13 rx fifo write pointer register (pcirfwpr) – Freescale Semiconductor MCF5480 User Manual
Page 531
Memory Map/Register Definition
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
19-47
19.3.3.2.12 Rx FIFO Read Pointer Register (PCIRFRPR)
19.3.3.2.13 Rx FIFO Write Pointer Register (PCIRFWPR)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
0
ReadPtr
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0x84D0
Figure 19-45. Rx FIFO Read Pointer Register (PCIRFRPR)
Table 19-44. PCIRFRPR Field Descriptions
Bits
Name
Description
31–7
—
Reserverd, should be cleared.
6–0
ReadPtr
This value is maintained by the FIFO hardware and is not normally written by the user. It can be
adjusted in special cases but will disrupt the integrity of the data flow. This value represents the
Read address being presented to the FIFO RAM.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
0
WritePtr
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0x84D4
Figure 19-46. Rx FIFO Write Pointer Register (PCIRFWPR)