MAX1258 Maxim Integrated Products, MAX1258 Datasheet - Page 25

• Manufacturer Part Number: MAX1258
• Description: Multichannel ADCs/DACs
• Manufacturer: Maxim Integrated Products

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Table 5. Setup Register*
Table 5a. Clock Modes*
Table 5b. Clock Modes 00, 01, and 10
*See below for bit details.
*See the Clock Modes section.
REFSEL1 REFSEL0
CKSEL1
0
0
1
1
0
0
1
1
BIT NAME
DIFFSEL1
DIFFSEL0
REFSEL1
REFSEL0
CKSEL1
CKSEL0
—
—
12-Bit, Multichannel ADCs/DACs with FIFO,
CKSEL0
0
1
0
1
0
1
0
1
______________________________________________________________________________________
External single-
(ADC), external
REF2 for ADC)
Internal (ADC)
REFERENCE
Internal (DAC
ended (REF1
for DAC and
and external
REF1 (DAC)
REF1 (DAC)
Temperature Sensing, and GPIO Ports
VOLTAGE
differential
and ADC)
External
7 (MSB)
0 (LSB)
CONVERSION CLOCK
External (4.8MHz max)
BIT
6
5
4
3
2
1
Internal
Internal
Internal
CONDITIONS
Temperature
Temperature
Temperature
Temperature
OVERRIDE
Set to zero to select setup register.
Set to one to select setup register.
Clock mode and CNVST configuration; resets to one at power-up.
Clock mode and CNVST configuration.
Reference-mode configuration.
Reference-mode configuration.
Unipolar-/bipolar-mode register configuration for differential mode.
Unipolar-/bipolar-mode register configuration for differential mode.
AIN
AIN
AIN
AIN
Inter nal r efer ence tur ns off after scan i s com p l ete. If
i nter nal r efer ence i s tur ned off, ther e i s a p r og r am m ed
d el ay of 218 i nter nal - conver si on cl ock cycl es.
Internal reference required. There is a programmed
delay of 244 internal-conversion clock cycles for the
internal reference to settle after wake-up.
Internal reference not used.
Internal reference required. There is a programmed
delay of 244 internal-conversion clock cycles for the
internal reference to settle after wake-up.
Default reference mode. Internal reference turns off
after scan is complete. If internal reference is turned
off, there is a programmed delay of 218 internal-
conversion clock cycles.
Internal reference required. There is a programmed
delay of 244 internal-conversion clock cycles for the
internal reference to settle after wake-up.
Internal reference not used.
Internal reference required. There is a programmed
delay of 244 internal-conversion clock cycles for the
internal reference to settle after wake-up.
Externally timed by CNVST.
ACQUISITION/SAMPLING
Externally timed by SCLK.
Internally timed.
Internally timed.
AUTOSHUTDOWN
FUNCTION
CNVST CONFIGURATION
AIN15/AIN11/AIN7
AIN15/AIN11/AIN7
CNVST
CNVST
CONFIGURATION
AIN14/AIN10/AIN6
AIN14/AIN10/AIN6
REF2
REF2
REF2
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