DSPA56371 datasheet(13/124 Pages) FREESCALE

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Signal/Connection Descriptions

Freescale Semiconductor

DSP56371 Technical Data

Table 6. Interrupt and Mode Control

Signal Name

Type

State

During

Reset

Signal Description

MODA/IRQA

Input

Mode Select A/External Interrupt Request A—MODA/IRQA is an active-low

Schmitt-trigger input, internally synchronized to the DSP clock. MODA/IRQA

selects the initial chip operating mode during hardware reset and becomes a

level-sensitive or negative-edge-triggered, maskable interrupt request input

during normal instruction processing. MODA, MODB, MODC and MODD

select one of 16 initial chip operating modes, latched into the OMR when the

RESET signal is deasserted. If the processor is in the stop standby state and

the MODA/IRQA pin is pulled to GND, the processor will exit the stop state.

Internal Pull up resistor.

This input is 5 V tolerant.

MODB/IRQB

Input

Mode Select B/External Interrupt Request B—MODB/IRQB is an active-low

Schmitt-trigger input, internally synchronized to the DSP clock. MODB/IRQB

selects the initial chip operating mode during hardware reset and becomes a

level-sensitive or negative-edge-triggered, maskable interrupt request input

during normal instruction processing. MODA, MODB, MODC and MODD

select one of 16 initial chip operating modes, latched into OMR when the

RESET signal is deasserted.

Internal Pull up resistor.

This input is 5 V tolerant.

MODC/IRQC

Input

Mode Select C/External Interrupt Request C—MODC/IRQC is an active-low

Schmitt-trigger input, internally synchronized to the DSP clock. MODC/IRQC

selects the initial chip operating mode during hardware reset and becomes a

level-sensitive or negative-edge-triggered, maskable interrupt request input

during normal instruction processing. MODA, MODB, MODC and MODD

select one of 16 initial chip operating modes, latched into OMR when the

RESET signal is deasserted.

Internal Pull up resistor.

This input is 5 V tolerant.

MODD/IRQD

Input

Mode Select D/External Interrupt Request D—MODD/IRQD is an active-low

Schmitt-trigger input, internally synchronized to the DSP clock. MODD/IRQD

selects the initial chip operating mode during hardware reset and becomes a

level-sensitive or negative-edge-triggered, maskable interrupt request input

during normal instruction processing. MODA, MODB, MODC and MODD

select one of 16 initial chip operating modes, latched into OMR when the

RESET signal is deasserted.

Internal Pull up resistor.

This input is 5 V tolerant.

DSPA56371 Datasheet(PDF) 13 Page - Freescale Semiconductor, Inc

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