Texas Instruments TCM4300 manual Dspcsl, Dspstrbl, Dsprw, Dspa Dspd

3.10Switching Characteristics, TCM4300 to DSP Interface (Read Cycle) (see Figure 3±10)

PARAMETER

ALTERNATE

MIN MAX

UNIT

SYMBOL

tsu(R/W)

Setup time, read/write DSPRW stable before falling edge of

TRW(SU)

0

ns

strobe DSPSTRBL

th(R/W)

Hold time, read/write DSPRW stable after rising edge of

TRW(HO)

0

ns

strobe DSPSTRBL

tsu(CS)

Setup time, chip select stable DSPCSL before falling edge

TCS(SU)

0

ns

of strobe DSPSTRBL

th(CS)

Hold time, chip select DSPCSL stable after rising edge of

TCS(HO)

0

ns

strobe DSPSTRBL

tsu(RA)

Setup time, read address DSPA stable before strobe

TWA(SU)

0

ns

DSPSTRBL goes low

th(RA)

Hold time, read address DSPA stable after strobe

TWA(HO)

0

ns

DSPSTRBL goes high

ten(R)

Enable time, read data on falling edge of strobe DSPSTRBL

TRD(EN)

0

ns

to TCM4300 driving data bus DSPD

td(DV)

Delay read data valid time on falling edge of strobe

TRD(DV)

50

ns

DSPSTRBL to valid data DSPD

th(R)

Hold time, read data DSPD invalid after rising edge of

TRD(INV)

5

ns

strobe DSPSTRBL

tdis(R)

Disable time, read data. TCM4300 releases data bus after

TRD(DIS)

12

ns

rising edge of strobe DSPSTRBL

DSPCSL

10%

10%

tsu(CS)

th(CS)

90%

90%

DSPSTRBL

10%

10%

th(R / W)

tsu(R / W)

DSPRW

90%

90%

tsu(RA)

th(RA)

DSPA

DSPD

ten(R)

th(R)

td(DV) tdis(R)

Figure 3±10. TCM4300 to DSP Interface (Read Cycle)

3±10