DSP56857 datasheet(171/662 Pages) FREESCALE

tên linh kiện	DSP56857

Giải thích chi tiết về linh kiện	Digitial Signal Controller

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Features

Power-On Reset (POR) and Computer Operating Properly (COP), Rev. 4

Freescale Semiconductor

7-3

7.1 Introduction

The Power-on Reset (POR) function monitors the core power supply, the I/O, and analog power

supply. If either of those power supplies are below their thresholds, the POR output for each

respective supply is held high. Once the power supply goes above the thresholds, the POR

outputs are held low.

Computer Operating Properly (COP) is also discussed in this chapter as it relates to resets.

7.2 Features

•

The circuit monitors both the core power supply and peripheral power supply

•

Holds a wide chip reset once either of these supply voltages are below the thresholds

•

Generates the address of the Reset Vector provided to the core after exit Reset

•

The address of Reset Vector (same as the COP Reset) is located at $1F0000

The COP module design features include:

•

Programmable time-out period = (COP_PRESCALER

× (CT + 1)) oscillator clock cycles,

where CT can be from $0000 to $FFFF

•

Programmable Wait and Stop mode operations

•

COP timer is disabled while host CPU is in Debug mode

DSP56857 bảng dữ liệu(PDF) 171 Page - Freescale Semiconductor, Inc