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Y2554 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
Y2554 5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN Texas-Instruments
Texas Instruments Texas-Instruments
Y2554 Datasheet PDF : 50 Pages
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TLC2554, TLC2558
5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS220A –JUNE 1999
modes using the FIFO: modes 01, 10, 11 timing (continued)
Mode 10 (sweep mode) requires reconfiguration at the start of each new sweep sequence. Once the FIFO is
filled up to the programmed threshold, the host has the option to either read the FIFO or configure for other
modes. Once the FIFO is read, the host must reconfigure the device before the next sweep sequence can be
started. So the sequence is either configure : triggered conversions : FIFO read : configure. or configure :
triggered conversions : configure : .... Each configure clears the FIFO and the action that follows the configure
command depends on the mode setting of the device.
Mode 11 (repeat sweep mode) requires one cycle configuration. This sweep sequence can be repeated without
reconfiguration. Once the FIFO is filled up to the programmed threshold, the host has the option to either read
the FIFO or configure for other modes. So the sequence is either configure : triggered conversions : FIFO read
: triggered conversions : FIFO read ... or configure : triggered conversions : configure : .... Each configure clears
the FIFO and the action that follows the configure command depends on the mode setting of the device.
Configure
Conversion
From Channel 0
Conversion
From Channel 3
Conversion
From Channel 0
Conversion
From Channel 3
CS
FS
(DSP)
tsample(3)
tsample(2)
tsample(1)
tsample(4)
tconvert
tconvert
CSTART
SDI
ÎÎÎÎÎÎÎÎÎÎtSÎÎampÎÎle(i)ÎÎ>=MÎÎIN(tSÎÎampÎÎle) ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
INT
SDO
Repeat
Read FIFO #1
#2
Top of FIFO
#3
#4
First FIFO Read
Command = Configure write for mode 10 or 11, FIFO threshold = 1/2, sweep seq = 0–1–2–3.
Command = Read FIFO
Repeat
Read FIFO #1
Second FIFO Read
Figure 12. TLC2554/TLC2558 Mode 10/11 DSP Serial Interface (conversions triggered by FS)
16
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