MAX11301 Datasheet, PDF (41/55 Pages) Maxim Integrated Products – Programmable Sample Averaging Per ADC Port

MAX11301
PIXI, 20-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
Device Control Register (Read/Write) (continued)
BIT
FIELD NAME
DESCRIPTION
6
DACREF
DAC voltage reference selection
• 0: External reference voltage
• 1: Internal reference voltage
7
THSHDN
Thermal shutdown enable
• 0: Thermal shutdown function disabled.
• 1: Thermal shutdown function enabled. If the internal temperature monitor is enabled, and
if the internal temperature is measured to be larger than 145°C, the device is reset, thus
bringing all channels to high-impedance mode and setting all registers to their default value.
10:8
TMPCTL[2:0]
Temperature monitor selection
• TMPCTL[0]: Internal temperature monitor (0: disabled; 1: enabled)
• TMPCTL[1]: 1st external temperature monitor (0: disabled; 1: enabled)
• TMPCTL[2]: 2nd external temperature monitor (0: disabled; 1: enabled)
11
TMPPER
Temperature conversion time control
• 0: Default conversion time setting. Selected for junction capacitance filter < 100pF.
• 1: Extended conversion time setting. Selected for junction capacitance filter from 100pF to
390pF
12
RS_CANCEL
Temperature sensor series resistor cancellation mode
• 0: Temperature sensor series resistance cancellation disabled.
• 1: Temperature sensor series resistance cancellation enabled.
13
LPEN
Power mode selection
• 0: Default power mode for normal operations
• 1: Lower power mode. The analog ports are in high-impedance mode. The device can be
brought out of the lower power mode by deasserting this bit. The device would then undergo
the regular power-on sequence.
14
BRST
Serial interface burst-mode selection
• 0: Default address incrementing mode. The address is automatically incremented by “1” in
burst mode.
• 1: Contextual address incrementing mode. In burst mode, the address automatically points
to the next ADC- or DAC-configured port data register. Specifically, when reading ADC data
(writing DAC data), the serial interface reads (writes to) only the data registers of those ports
that are ADC-configured (DAC-configured). This mode applies to ADC data read and DAC
data write, not DAC data read.
15
RESET
Soft reset control
• Self-clearing soft reset register, equivalent to power-on reset.
GPI Data Registers (Read)
BIT
FIELD NAME
DESCRIPTION
15:0
GPIDAT[15:0]
Data received on GPI ports 0 to 19
3:0
GPIDAT[19:16]
• The data received on GPI-configured ports can be read by the host.
• For a given port i (0≤i≤19)
• GPIDAT[i] = 0: A logic zero level is received at GPI port i
• GPIDAT[i] = 1: A logic one level is received at GPI port i
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