ST18D952 Ver la hoja de datos (PDF) - STMicroelectronics

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ST18D952

DIGITAL SIGNAL PROCESSOR (DSP) CHIP

STMicroelectronics 

ST18952

Table 5.1 Possible BSU register settings

EN_I

1

1

1

1

0

0

0

0

EN_X EN_Y Operation

Allowed or forbidden

1

1 Exchanges enabled on I/X/Y spaces

Allowed

1

0 Exchanges enabled on I and X spaces

Only DTACK generation on Y space

Allowed

0

1 Exchanges enabled on I and Y spaces

Only DTACK generation on X space

Forbidden

(X direct & I/Y through BSU)

0

0 Exchanges enabled on I space

Forbidden

Only DTACK generation on X and Y spaces (X direct & I through BSU)

1

1 Exchanges enabled on X and Y spaces

Only DTACK generation on I space

Allowed

1

0 Exchanges enabled on X space

Allowed

Only DTACK generation on I and Y spaces

0

1 Exchanges enabled on Y space

Forbidden

Only DTACK generation on I and X spaces (X direct & Y through BSU)

0

0 No exchange

Allowed

Only DTACK generation on I, X and Y spaces

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