Endpoint – Freescale Semiconductor MCF5480 User Manual
Page 903
Memory Map/Register Definition
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
29-29
29.2.4.3
Endpoint n Interface Number Register (EP0IFR, EPnOUTIFR, EPnINIFR)
These registers identify which interface each particular endpoint is a member of. They should be updated
by the USB application before enabling the USB device for the first time and again following a
configuration change (that is, upon the reception of a SET_CONFIGURATION or SET_INTERFACE
request).
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
ADDTRANS
MAXPKTSZ
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB14A (EP1NPSR); 0xB17A (EP2NPSR); 0xB1AA (EP3INPSR); 0xB1DA (EP4INPSR);
0xB20A (EP5INPSR); 0xB23A (EP6INPSR)
Figure 29-29. Endpoint n Max Packet Size Register IN (EPnINMPSR)
Table 29-27. EPnOUTMPSR and EPnINMPSR Field Descriptions
Bits
Name
Description
15–13
—
Reserved, should be cleared.
12–11
ADDTRANS Additional transactions. For high-speed isochronous and interrupt endpoints only. This is
the number of additional transaction opportunities per microframe.
00 0 additional transactions (1 total)
01 1 additional transaction (2 total)
10 2 additional transactions (3 total)
11 Reserved
10–0
MAXPKTSZ Maximum packet size. This is the maximum packet size in bytes. The packet size must not
exceed the USB 2.0 specification for the selected endpoint type and device speed.
7
6
5
4
3
2
1
0
R
IFNUM
W
Reset
0
0
0
0
0
0
0
0
Reg
Addr
MBAR + 0xB104(EP0OUTIFR); 0xB134(EP1OUTIFR); 0xB164(EP2OUTIFR);
0xB194(EP3OUTIFR); 0xB1C4(EP4OUTIFR); 0xB1F4(EP5OUTIFR);
0xB224(EP6OUTIFR)
Figure 29-30. Endpoint n Interface Number Register OUT (EPnOUTIFR)