AT83SND2C-7FTIL datasheet(6/236 Pages) ATMEL

Part #	AT83SND2C-7FTIL

Description	Single-Chip Flash Microcontroller with MP3 Decoder with Full Audio Interface

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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6

AT8xC51SND2C

4341E–MP3–06/05

Table 4. Audio Interface Signal Description

Table 5. USB Controller Signal Description

Table 6. MutiMediaCard Interface Signal Description

INT1

I

Timer 1 Gate Input

INT1 serves as external run control for timer 1, when selected by

GATE1 bit in TCON register.

External Interrupt 1

INT1 input sets IE1 in the TCON register. If bit IT1 in this register is set,

bit IE1 is set by a falling edge on INT1#. If bit IT1 is cleared, bit IE1 is

set by a low level on INT1#.

P3.3

T0

I

Timer 0 External Clock Input

When timer 0 operates as a counter, a falling edge on the T0 pin

increments the count.

P3.4

T1

I

Timer 1 External Clock Input

When timer 1 operates as a counter, a falling edge on the T1 pin

increments the count.

P3.5

Signal

Name

Type

Description

Alternate

Function

DCLK

O

DAC Data Bit Clock

-

DOUT

O

DAC Audio Data Output

-

DSEL

O

DAC Channel Select Signal

DSEL is the sample rate clock output.

-

SCLK

O

DAC System Clock

SCLK is the oversampling clock synchronized to the digital audio data

(DOUT) and the channel selection signal (DSEL).

-

Signal

Name

Type

Description

Alternate

Function

D+

I/O

USB Positive Data Upstream Port

This pin requires an external 1.5 K

Ω pull-up to V

DD for full speed

operation.

-

D-

I/O

USB Negative Data Upstream Port

-

Signal

Name

Type

Description

Alternate

Function

MCLK

O

MMC Clock output

Data or command clock transfer.

-

MCMD

I/O

MMC Command line

Bidirectional command channel used for card initialization and data

transfer commands. To avoid any parasitic current consumption,

unused MCMD input must be polarized to V

DD or VSS.

-

MDAT

I/O

MMC Data line

Bidirectional data channel. To avoid any parasitic current consumption,

unused MDAT input must be polarized to V

DD or VSS.

-

Signal

Name

Type

Description

Alternate

Function

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AT83SND2C-7FTIL Datasheet(PDF) 6 Page - ATMEL Corporation

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