THS1209 Datasheet, PDF (25/33 Pages) Texas Instruments – 12-BIT, 2 ANALOG INPUT, 8MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER

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THS1209
SLAS288B – JULY 2000 – REVISED DECEMBER 2002
Write Timing (using WR, WR-controlled)
Figure 30 shows the write-timing behavior when the WR(R/W) input is programmed as a write input WR only. The
input RD acts as the read input in this configuration. This timing is called WR-controlled because WR is the last
external signal of CS0, CS1, and WR which becomes valid.
CS0
CS1
tsu(CS)
tw(WR)
th(CS)
WR
10%
RD ^{ÓÓÓÓÓÓÓÓ}
D(0–9)
90%
10%
tsu ÔÔÔÔÔÔÔÔ
th
90%
DATA_AV ÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖÖ
Figure 30. Write Timing Diagram Using WR (WR-controlled)
Write Timing Parameter Using WR (WR-controlled)
PARAMETER
tsu(CS)
tsu
th
th(CS)
tw(WR)
Setup time, CS stable to last WR valid
Setup time, data valid to first WR invalid
Hold time, WR invalid to data invalid
Hold time, WR invalid to CS change
Pulse duration, WR active
MIN TYP MAX UNIT
0
ns
5
ns
2
ns
5
ns
10
ns
25