DSP56600FMSLASHAD datasheet(26/76 Pages) NXP

26 / 76 page

Preliminary

1-20

DSP56652 Technical Data Sheet

MOTOROLA

Pin and Signal Descriptions

DSP56652 Signal Description

Normal:

MUX_CTL driven low

INT6

STDA

DSR

Input or

Output

Input

Interrupt 6

ÑWhen selected, this signal can be programmed as an

interrupt input or a GPIO signal, and has a 47k

W pull-up resistor.

As a Schmitt trigger interrupt input, the signal can be programmed

to be level sensitive, positive edge-triggered, or negative edge-

triggered. When edge-triggered, triggering occurs at a voltage level

and is not directly related to the fall time of the interrupt signal;

however, as signal fall time of the interrupt signal increases, the

probability of generating multiple interrupts due to this noise also

increases.

Audio codec serial transmit data

(alternate)ÑWhen programmed

as STDA, this signal transmits data from the serial transmit shift

Note:

When this signal is used as STDA, the primary STDA signal

is disabled. (See Table 1-18 on page 1-31.)

Data set ready

ÑWhen programmed as GPIO output, this signal can

be used as the DSR output for the serial data port. (See Table 1-15

on page 1-26)

The signal is a GPIO when not programmed as one of the above

functions. After reset, the default state for this signal is GPI.

Alternate:

MUX_CTL driven high

TRST

Input

Test Reset

ÑWhen selected, this signal acts as the TRST input for the

JTAG TAP controller. The signal is a Schmitt trigger input that

asynchronously initializes the JTAG test controller when asserted.

Note:

When this signal is enabled, the primary TRST signal is

disconnected from the TAP controller. (See Table 1-22

on page 1-36.)

Table 1-12

Interrupt Signals (Continued)

Signal

Name

Signal

Type

State

during

Reset

Signal Description

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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