TMS320VC549 Datasheet, PDF (43/60 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

TMS320VC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
serial port transmit timing (continued)
SPRS078F – SEPTEMBER 1998 – REVISED MAY 2000
switching characteristics over recommended operating conditions for serial port transmit with
internal clocks and frames [H = 0.5t_c(CO)] (see Figure 23)
PARAMETER
’549-80
’549-100
’549-120
UNIT
MIN TYP MAX
tc(SCK)
td(FSX)
td(DX)
tdis(DX)
th(DX)
tf(SCK)
tr(SCK)
tw(SCK)
Cycle time, serial port clock
Delay time, CLKX rising to FSX
Delay time, CLKX rising to DX
Disable time, CLKX rising to DX
Hold time, DX valid after CLKX rising edge
Fall time, serial port clock
Rise time, serial port clock
Pulse duration, serial port clock low/high
8H
ns
7 ns
7 ns
20 ns
–2
ns
3 ns
3 ns
4H–4
ns
CLKX
FSX
DX
td(FSX)
tc(SCK)
tw(SCK)
td(FSX)
tw(SCK)
td(DX)
th(DX)
tf(SCK)
tr(SCK)
tdis(DX)
1
2
7/15
8/16
Figure 23. Serial Port Transmit Timing With Internal Clocks and Frames
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