9 usb endpoint n fifo read pointer (epnfrp), 10 usb endpoint n fifo write pointer (epnfwp), Usb endpoint – Freescale Semiconductor MCF5480 User Manual
Page 919
Memory Map/Register Definition
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
29-45
29.2.5.9
USB Endpoint n FIFO Read Pointer (EPnFRP)
29.2.5.10 USB Endpoint n FIFO Write Pointer (EPnFWP)
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
Uninitialized
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
RP
W
Reset
Uninitialized
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB460 (EP0FRP); 0xB490 (EP1FRP); 0xB4C0 (EP2FRP); 0xB4F0 (EP3FRP);
0xB520 (EP4FRP); 0xB550 (EP5FRP); 0xB580 (EP6FRP)
Figure 29-49. USB Endpoint n FIFO Read Pointer (EPnFRP)
Table 29-44. EPnFRP Field Descriptions
Bits
Name
Description
31–12
—
Reserved, should be cleared.
11–0
RP
Read pointer. This value is maintained by the FIFO hardware and is not normally written.
Writing to these bits 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
Uninitialized
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
0
WP
W
Reset
Uninitialized
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB464 (EP0FWP); 0xB494 (EP1FWP); 0xB4C4 (EP2FWP); 0xB4F4 (EP3FWP);
0xB524 (EP4FWP); 0xB554 (EP5FWP); 0xB584 (EP6FWP)
Figure 29-50. USB Endpoint n FIFO Write Pointer (EPnFWP)