Stereo System User Manual

3-14 DSP56012 User’s Manual MOTOROLA

Memory, Operating Modes, and Interrupts

Operating Modes

ends up in the first location of the Program ROM (program address

$0A00).

Note: It is not possible to reach operating Mode 4 during hardware reset. Any

attempt to start up in Mode 4 defaults to Mode 1.

Mode 5 In this mode, the bootstrap ROM is enabled and the bootstrap

program is executed after hardware reset. The internal Program RAM

is loaded with 256 words from the Serial Host Interface (SHI). The SHI

operates in the SPI Slave mode, with 24-bit word width.

Mode 6 Reserved.

Note: It is not possible to reach operating Mode 6 during hardware reset. Any

attempt to start up in Mode 6 defaults to Mode 1.

Mode 7 In this mode, the bootstrap ROM is enabled and the bootstrap

program is executed after hardware reset. The internal Program RAM

is loaded with 256 oords from the Serial Host Interface (SHI). The SHI

operates in the I

C Slave mode, with 24-bit word width.

Note: The OnCE port operation is enabled at hardware reset. This means the

device can enter the Debug mode at any time after hardware reset.