TCM4300 Datasheet, PDF (34/69 Pages) Texas Instruments – Advanced RF Cellular Telephone Interface Circuit (ARCTIC )

3.11 Switching Characteristics, TCM4300 to DSP Interface (Write Cycle) (see
Figure 3–11)
PARAMETER
ALTERNATE
SYMBOL
MIN MAX UNIT
tsu(R/W)
Setup time, read/write DSPRW stable before falling edge of
strobe DSPSTRBL
TRW(SU)
0
ns
th(R/W)
Hold time, read/write DSPRW stable after rising edge of
strobe DSPSTRBL
TRW(HO)
0
ns
tsu(CS)
Setup time, chip select stable DSPCSL before falling edge
of strobe DSPSTRBL
TCS(SU)
0
ns
th(CS)
Hold time, chip select DSPCSL stable after rising edge of
strobe DSPSTRBL
TCS(HO)
0
ns
tsu(WA)
Setup time, write address DSPA stable before falling edge
of strobe DSPSTRBL
TWA(SU)
0
ns
th(WA)
Hold time, write address DSPA stable after rising edge of
strobe DSPSTRBL
TWA(HO)
0
ns
tsu(W)
Setup time, write data stable DSPD before rising edge of
strobe DSPSTRBL
TWD(SU)
3
ns
Hold time, write data stable DSPD after rising edge of
th(W)
strobe DSPSTRBL
TWD(HO)
0
ns
tw(WSTB) Pulse duration, write strobe pulse width low on DSPSTRBL TWR(STB)
25
ns
DSPCSL
DSPSTRBL
DSPRW
DSPA
tsu(CS)
tsu(R _{/ W)}
10%
10%
90%
10%
tw(WSTB)
90%
10%
th(CS)
th(R _{/ W)}
tsu(WA)
th(WA)
DSPD
tsu(W)
Figure 3–11. TCM4300 to DSP Interface (Write Cycle)
th(W)
3–12