TMS320LC549PGE-80 Datasheet, PDF (43/63 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

TMS320LC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
serial port transmit timing (continued)
SPRS077B − SEPTEMBER 1998 − REVISED FEBRUARY 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
’549-66
MIN TYP MAX
’549-80
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
−5
4
4
4H −8
8H
15
15
20
−2
4H −4
ns
7 ns
7 ns
20 ns
ns
3 ns
3 ns
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
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
43