56F8014 datasheet(79/125 Pages) FREESCALE

tên linh kiện	56F8014

Giải thích chi tiết về linh kiện	16-bit Digital Signal Controllers

PDF	125 Pages

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Resets

56F8014 Technical Data, Rev. 9

Freescale Semiconductor

Preliminary

Figure 6-15 Sources of RESET Functional Diagram (Test modes not included)

POR resets are extended 64 MSTR_OSC clocks to stabilize the power supply. All resets are subsequently

extended for an additional 32 MSTR_OSC clocks and 64 system clocks as the various internal reset

controls are released. Given the normal relaxation oscillator rate of 8MHz, the duration of a POR reset

from when power comes on to when code is running is 28

μS. An external reset generation chip may also

be used. Resets may be asserted asynchronously, but they are always released internally on a rising edge

of the system clock.

EXTENDED_POR

JTAG

Memory

Subsystem

Peripherals

56800E

CORE_RST

Delay 32

sys clocks

OCCS

CLKGEN_RST

PERIP_RST

Delay 32

sys clocks

pulse shaper

SW Reset

pulse shaper

Delay 32

MSTR_OSC

Clocks

pulse shaper

POR

Power-On

Reset

(active

low)

External

RESET IN

(active

low)

COP

(active

low)

RESET

Delay 64

MSTR_OSC

Clocks

Delay blocks assert immediately and

deassert only after the programmed

number of clock cycles.

COMBINED_RST

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