2 usb dropped packet counter register (dpcnt), 3 usb crc error counter register (crcecnt), 4 usb bitstuffing error counter register (bsecnt) – Freescale Semiconductor MCF5480 User Manual
Page 898: Usb dropped packet counter register (dpcnt) -24, Usb crc error counter register (crcecnt) -24
MCF548x Reference Manual, Rev. 3
29-24
Freescale Semiconductor
29.2.3.2
USB Dropped Packet Counter Register (DPCNT)
29.2.3.3
USB CRC Error Counter Register (CRCECNT)
29.2.3.4
USB Bitstuffing Error Counter Register (BSECNT)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
DPCNT
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB082
Figure 29-19. USB Dropped Packet Counter Register (DPCNT)
Table 29-19. DPCNT Field Descriptions
Bits
Name
Description
15–0
DPCNT
Packet dropped counter. This register counts the number of packets that have been
dropped by the USB due to errors.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
CRCECNT
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB084
Figure 29-20. USB CCR Error Counter Register (CRCECNT)
Table 29-20. CRCECNT Field Descriptions
Bits
Name
Description
15–0
CRCECNT CRC error counter. This register counts the occurrences of CRC errors in token and data
packets received by the USB.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
BSECNT
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB086
Figure 29-21. USB Bitstuffing Error Counter Register (BSECNT)