AT83SND1CXXX-ROTIL datasheet(81/212 Pages) ATMEL

Il numero della parte	AT83SND1CXXX-ROTIL

Spiegazioni elettronici	Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface

PDF	212 Pages

Scroll/Zoom	100%

Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

Logo

81 / 212 page

4109J–8051–10/06

AT8xC51SND1C

Figure 14-3 shows how to connect the AT8xC51SND1C to the USB connector. D+ and D- pins

are connected through 2 termination resistors. A pull-up resistor is implemented on D+ to inform

the host of a full speed device connection. Value of these resistors is detailed in the section “DC

Characteristics”.

Figure 14-1. USB Device Controller Block Diagram

Figure 14-2. USB Connection

14.1.1

Clock Controller

The USB controller clock is generated by division of the PLL clock. The division factor is given by

USBCD1:0 bits in USBCLK register (see Table 94). Figure 14-3 shows the USB controller clock

generator and its calculation formula. The USB controller clock frequency must always be 48

MHz.

Figure 14-3. USB Clock Generator and Symbol

14.1.2

Serial Interface Engine (SIE)

The SIE performs the following functions:

•

NRZI data encoding and decoding.

USB

CLOCK

48 MHz

12 MHz

D+

D-

DPLL

SIE

UFI

USB

Buffer

To/From

C51 Core

D+

D-

VBUS

GND

D+

D-

VSS

To Power

USB

RUSB

VDD

Supply

USBCD1:0

USBCLK

48 MHz USB Clock

USBclk

PLLclk

USBCD

--------------------------------

USB

CLOCK

USB Clock Symbol

PLL

CLOCK

AT83SND1CXXX-ROTIL Scheda tecnica(PDF) 81 Page - ATMEL Corporation

AT83SND1CXXX-ROTIL Scheda tecnica(HTML) 81 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL