DSP56600FMSLASHAD datasheet(27/76 Pages) NXP

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DSP56652

DSP56652 Signal Description

Preliminary

MOTOROLA

DSP56652 Technical Data Sheet

1-21

Normal:

MUX_CTL driven low

INT7

SRDA

DTR

SCLK

Input or

Output

Input

Interrupt 7

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 receive data

(alternate)ÑWhen programmed as

SRDA, this signal receives data into the serial receive shift register in

the serial audio codec port.

Note:

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

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

Data terminal ready

ÑWhen programmed as GPIO, this signal is

used as the DTR positive and negative edge-triggered interrupt

input for the serial data port. (See Table 1-15 on page 1-26.)

Serial clock

ÐWhen so programmed, this signal provides the input

clock for the serial data port (UART). (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

TMS

Input

Test Mode Select

ÑWhen selected, this signal acts as the TMS input

for the JTAG TAP controller. The signal is used to sequence that

TAP controller state machine. The TMS is sampled on the rising

edge of TCK.

Note:

When this signal is enabled, the primary TMS 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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