SMJ320LC549 Datasheet, PDF (36/52 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSOR

SMJ320LC549
FIXEDĆPOINT DIGITAL SIGNAL PROCESSOR
SGUS032B – OCTOBER 2002 – REVISED MAY 2003
serial port transmit timing (continued)
switching characteristics over recommended operating conditions for serial port transmit with
internal clocks and frames [H = 0.5t_c(CO)] (see Figure 23)
PARAMETER
549-60
UNIT
MIN TYP MAX
tc(SCK) Cycle time, serial port clock
td(FSX) Delay time, TCLKX rising to TFSX/TFRM
td(DX) Delay time, TCLKX rising to TDX
tdis(DX) Disable time, TCLKX rising to TDX
th(DX) Hold time, TDX valid after TCLKX rising edge
tf(SCK) Fall time, serial port clock
tr(SCK) Rise time, serial port clock
tw(SCK) Pulse duration, serial port clock low/high
*Not production tested.
– 5*
4H–8*
8H
ns
15 ns
15 ns
20* ns
ns
4
ns
4
ns
ns
TCLKX
TFSX/TFRM
TDX
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
36
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