TMS320VC549 datasheet(67/111 Pages) TI

номер детали	TMS320VC549

подробное описание детали	FIXED-POINT DIGITAL SIGNAL PROCESSORS

PDF	111 Pages

Scroll/Zoom	100%

производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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TMS320C54x, TMS320LC54x, TMS320VC54x

FIXED-POINT DIGITAL SIGNAL PROCESSORS

SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

multiply-by-N clock option – PLL enabled (continued)

timing requirements for multiply-by-N clock option – PLL enabled (see Figure 15)

’C54x-40

’LC54x-40

’LC54x-50

’54x-66

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

Integer PLL multiplier N (N = 1–15)

20†

400

20†

400

20†

400

tc(CI)

Cycle time, X2/CLKIN

PLL multiplier N = x.5

20†

200

20†

200

20†

200

tc(CI)

Cycle time, X2/CLKIN

PLL multiplier N = x.25, x.75

20†

100

20†

100

20†

100

tf(CI)

Fall time, X2/CLKIN

tr(CI)

Rise time, X2/CLKIN

tw(CIL)

Pulse duration, X2/CLKIN low

tw(CIH) Pulse duration, X2/CLKIN high

† Note that for all values of tc(CI), the minimum tc(CO) period must not be exceeded.

tc(CO)

tc(CI)

tw(COH)

tf(CO)

tr(CO)

tf(CI)

X2/CLKIN

CLKOUT

td(CIH-CO)

tw(COL)

tr(CI)

Unstable

tw(CIH)

tw(CIL)

Figure 15. External Multiply-by-One Clock Timing

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