Texas Instruments TCM4300 - Manual (Page 34)

3–11
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
th(W)
Hold time, write data stable DSPD after rising edge of
strobe DSPSTRBL
TWD(HO) 0 ns
tw(WSTB) Pulse duration, write strobe pulse width low on DSPSTRBL TWR(STB) 25 ns
90%
10%
tsu(W)
DSPA
DSPSTRBL
DSPD
10%
DSPCSL
DSPRW
th(WA)
tsu(WA)
10%
10%
90%
th(W)
tw(WSTB)
tsu(R / W)
tsu(CS) th(CS)
th(R / W)
Figure 3–11. TCM4300 to DSP Interface (Write Cycle)