dspb56011 Freescale Semiconductor, Inc, dspb56011 Datasheet - Page 24

• Manufacturer Part Number: dspb56011
• Description: 24-bit Dvd Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Signal/Connection Descriptions
OnCE Port
OnCE PORT
1-18
DSI
OS0
DSCK
OS1
Signal
Name
Output
Output
Signal
Input
Input
Type
Table 1-12 On-Chip Emulation Port (OnCE) Signals
DSP56011 Technical Data Sheet, Rev. 1
Output
Output
during
Reset
State
Low
Low
Preliminary Information
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.
Note:
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
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.
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.
Signal Description
1
/
8
of the processor clock
MOTOROLA