DSP56371 데이터 시트보기 (PDF) - Freescale Semiconductor

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DSP56371

high density CMOS device with 5.0-volt compatible inputs and outputs.

Freescale Semiconductor 

Signal/Connection Descriptions

Signal Name

MODA/IRQA

Table 6. Interrupt and Mode Control

Type

Input

State

During

Reset

Signal Description

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.

MODB/IRQB

Input

Input

Internal Pull up resistor.

This input is 5 V tolerant.

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.

MODC/IRQC Input

Input

Internal Pull up resistor.

This input is 5 V tolerant.

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.

MODD/IRQD Input

Input

Internal Pull up resistor.

This input is 5 V tolerant.

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.

Freescale Semiconductor

DSP56371 Technical Data

13

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