AT85C51SND3Bx
Table 137. UHFNUML Register
UHFNUML (1.DDh) – USB Host Frame Number Low Register
7
6
5
4
3
2
1
0
FNUM7
FNUM6
FNUM5
FNUM4
FNUM3
FNUM2
FNUM1
FNUM0
Bit
Bit
Number
Mnemonic Description
Frame Number
7-0
FNUM7:0
The value contained in tis register is the current SOF number.
This value can be modified by software.
Reset Value = 0000 0000b
Table 138. UHFLEN Register
UHFLEN (1.DEh) – USB Host Frame Length Register
7
6
5
4
3
2
1
0
FLEN7
FLEN6
FLEN5
FLEN4
FLEN3
FLEN2
FLEN1
FLEN0
Bit
Bit
Number
Mnemonic Description
Frame Length
7-0
FLEN7:0
The value contained
Reset Value = 0000 0000b
USB Host Pipe Registers
Table 139. UPNUM Register
UPNUM (1.C9h) – USB Host Pipe Number Register
7
6
5
4
3
2
1
0
-
-
-
-
-
PNUM2
PNUM1
PNUM0
Bit
Bit
Number
Mnemonic Description
Reserved
7-3
2-0
-
The value read from these bits is always 0. Do not set these bits.
Pipe Number
Select the pipe using this register. The USB Host registers ended by a X
correspond then to this number.
PNUM2:0
This number is used for the USB controller following the value of the PNUMD bit.
Reset Value = 0000 0000b
139
7632A–MP3–03/06
ATMEL [ ATMEL ]
