DSP56011 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56011

24-BIT DVD DIGITAL SIGNAL PROCESSOR

Motorola => Freescale 

Signal/Connection Descriptions

OnCE Port

OnCE PORT

Table 1-12 On-Chip Emulation Port (OnCE) Signals

PRELIMINARY Signal

Name

DSI

OS0

DSCK

OS1

Signal

Type

Input

Output

Input

Output

State

during

Reset

Signal Description

Low

Output

Debug Serial Input—In Debug mode, serial data or

commands are provided as inputs to the OnCE controller via

the DSI signal. Data is latched on the falling edge of the DSCK

serial clock. Data is always shifted into the OnCE serial port

Most Significant Bit (MSB) first. When switching from output

to input, the signal is tri-stated.

Chip Status 0—When the chip is not in Debug mode, this signal

is an output that works with the OS1 signal to provide

information about the chip status.

Low

Output

Note:

If the OnCE interface is in use, an external pull-down resistor

should be attached to this pin. If the OnCE interface is not in

use, the resistor is not required.

Debug Serial Clock—The DSCK signal is used in Debug mode

and supplies the serial input clock to the OnCE module to shift

data into and out of the OnCE serial port. (Data is clocked into

the OnCE port on the falling edge and is clocked out of the

OnCE serial port on the rising edge.) The debug serial clock

frequency must be no greater than 1/8 of the processor clock

frequency. When switching from input to output, the signal is

tri-stated.

Chip Status 1—When the chip is not in Debug mode, this signal

is an output that works with the OS0 signal to provide

information about the chip status.

Note:

If the OnCE interface is in use, an external pull-down resistor

should be attached to this pin. If the OnCE interface is not in

use, the resistor is not required.

1-18

Preliminary Information

DSP56011 Technical Data Sheet, Rev. 1

MOTOROLA

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