Datasheet

 
      
    
SLAS198E − FEBRUARY 1999 − REVISED JUNE 2003
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
conversion cycles (continued)
CS
CSTART
SDI
INT
EOC
SDO
Hi-Z
Select/Read
Cycle
Select/Read
Cycle
t
(sample )
t
(conv)
†
Previous Conversion
Result
Previous Conversion
Result
FS
Hi-Z Hi-Z
Device Going Into
Extended Sampling Mode
Device Get Out
Extended Sampling
Mode
Read
Cycle
†
Normal
Cycle
†
This is one of the single shot commands. Conversion starts on next rising edge of CSTART
.
Figure 9. Mode 00 Single Shot/Extended Sampling (FS Signal Used, FS Pin Connected to TMS320 DSP)
modes using the FIFO: modes 01, 10, 11 timing
CS
CSTART
SDI
INT
SDO
Hi-Z
From Channel 2
FS
†
§
‡‡‡ ‡ §
Hi-Z
Configure Select
Conversion #1
Select
Conversion #4
Read FIFO #1 #2 #3 #4
Top of FIFO
From Channel 2
¶ ¶ ¶ ¶
†
Command = Configure write for mode 01, FIFO threshold = 1/2
‡
Command = Read FIFO, first FIFO read
§
Command = Select ch2.
¶
Use any channel select command to trigger SDI input.
Figure 10. TLV2544/TLV2548 Mode 01 DSP Serial Interface (Conversions Triggered by FS)