Atmel AT85DVK-07 Especificaciones descargar pdf (Pagina 139)

139

AT85C51SND3Bx

7632A–MP3–03/06

Reset Value = 0000 0000b

USB Host Pipe Registers

Reset Value = 0000 0000b

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

Number

Bit

Mnemonic

Description

7-0 FNUM7:0

Frame Number

The value contained in tis register is the current SOF number.

This value can be modified by software.

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

Number

Bit

Mnemonic

Description

7-0 FLEN7:0

Frame Length

The value contained

Table 139. UPNUM Register

UPNUM (1.C9h) – USB Host Pipe Number Register

7 6 5 4 3 2 1 0

- - - - - PNUM2 PNUM1 PNUM0

Bit

Number

Bit

Mnemonic

Description

7-3 -

Reserved

The value read from these bits is always 0. Do not set these bits.

2-0 PNUM2:0

Pipe Number

Select the pipe using this register. The USB Host registers ended by a X

correspond then to this number.

This number is used for the USB controller following the value of the PNUMD bit.

1 2 ... 134 135 136 137 138 139 140 141 142 143 144 ... 262 263

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