TMS320VC549 datasheet(52/63 Pages) TI

номер детали	TMS320VC549

подробное описание детали	FIXED-POINT DIGITAL SIGNAL PROCESSOR

PDF	63 Pages

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производитель	TI [Texas Instruments]

домашняя страница	http://www.ti.com

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TMS320VC549

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS078G − SEPTEMBER 1998 − REVISED OCTOBER 2004

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

serial-port transmit timing in TDM mode (continued)

timing requirements over recommended ranges of supply voltage and operating free-air

temperature [H = 0.5tc(CO)] (see Figure 28)

549−80

549-100

549-120

UNIT

MIN

MAX

tc(SCK)

Cycle time, serial-port clock

16H†

‡

tf(SCK)

Fall time, serial-port clock

tr(SCK)

Rise time, serial-port clock

tw(SCK)

Pulse duration, serial-port clock low/high

8H†

† When SCK is generated internally, this value is typical.

‡ The serial-port design is fully static and, therefore, can operate with tc(SCK) approaching 1. It is characterized approaching an input frequency

of 0 Hz but tested as a much higher frequency to minimize test time.

B12

B13

B14

tw(SCK)

th(TCH-TDV)

td(TCH-TFV)

TFRM

TADD

TDAT

TCLK

B15

tc(SCK)

td(TC-TDV)

th(TCH-TDV)

td(TCH-TFV)

td(TC-TDV)

tr(SCK)

tf(SCK)

Figure 28. Serial-Port Transmit Timing in TDM Mode

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