AT89C5132-ROTIL datasheet(6/181 Pages) ATMEL

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4173D–USB–02/06

AT89C5132

Table 4. Audio Interface Signal Description

Table 5. USB Controller Signal Description

Table 6. MutiMediaCard Interface Signal Description

Timer 0 External Clock Input

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

the count.

P3.4

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

DAC Data Bit Clock

DOUT

DAC Audio Data

DSEL

DAC Channel Select Signal

DSEL is the sample rate clock output.

SCLK

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

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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