TMS320VC549 datasheet(92/111 Pages) TI

92 / 111 page

TMS320C54x, TMS320LC54x, TMS320VC54x

FIXED-POINT DIGITAL SIGNAL PROCESSORS

SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

serial port transmit timing (continued)

switching characteristics over recommended operating conditions for serial port transmit with

internal clocks and frames [H = 0.5tc(CO)] (see Figure 34)

PARAMETER

’C54x-40

’LC54x-40

’LC54x-50

’54x-66

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

tc(SCK)

Cycle time, serial port clock

td(FSX)

Delay time, CLKX rising to FSX

td(DX)

Delay time, CLKX rising to DX

tdis(DX)

Disable time, CLKX rising to DX

th(DX)

Hold time, DX valid after CLKX rising edge

–5

tf(SCK)

Fall time, serial port clock

tr(SCK)

Rise time, serial port clock

tw(SCK)

Pulse duration, serial port clock low/high

4H – 8

FSX

CLKX

8/16

7/15

th(DX)

tw(SCK)

tc(SCK)

td(FSX)

td(DX)

tdis(DX)

tw(SCK)

tr(SCK)

tf(SCK)

Figure 34. Serial Port Transmit Timing With Internal Clocks and Frames

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