Datasheet

ADS7924

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SBAS482A –JANUARY 2010–REVISED MAY 2010

MODECNTRL: ADC Mode Control Register (Address = 00h)

7 6 5 4 3 2 1 0

MODE5 MODE4 MODE3 MODE2 MODE1 MODE0 SEL/ID1 SEL/ID0

Bits[7:2] MODE[5:0]: Mode control

000000 = Idle mode (default)

100000 = Awake mode

110000 = Manual-Single mode

110010 = Manual-Scan mode

110001 = Auto-Single mode

110011 = Auto-Scan mode

111001 = Auto-Single with Sleep mode

111011 = Auto-Scan with Sleep mode

111111 = Auto-Burst Scan with Sleep mode

Bits[1:0] SEL/ID[1:0]: Channel selection

When read, these bits indicate the last channel converted.

When writing to these bits, select which input appears on MUXOUT:

00 = Channel 0 is selected

01 = Channel 1 is selected

10 = Channel 2 is selected

11 = Channel 3 is selected (unless the CALCNTRL bit is set to '1')

INTCNTRL: Interrupt Control Register (Address = 01h)

7 6 5 4 3 2 1 0

ALRM_ST3 ALRM_ST2 ALRM_ST1 ALRM_ST0 AEN/ST3 AEN/ST2 AEN/ST1 AEN/ST0

Bits[7:4] ALRM_ST[3:0]: Alarm status (read-only)

Reading these bits indicates the alarm status for the channels. These bits are never masked—they always report the alarm

status even when the alarm is not enabled by the corresponding AEN/ST bits.

Bit 7 = Channel 3 alarm status, '1' indicates an alarm condition

Bit 6 = Channel 2 alarm status, '1' indicates an alarm condition

Bit 5 = Channel 1 alarm status, '1' indicates an alarm condition

Bit 4 = Channel 0 alarm status, '1' indicates an alarm condition

Bits[3:0] AEN/ST[3:0]: Alarm enable

Writing to these bits enables the alarm for the corresponding channel.

Reading these bits returns the status of the alarm for the corresponding channel when enabled. Reading returns a '0' when

the alarm in not enabled.

Bit 3 = Channel 3 alarm enable, 1 = enabled (default = 0)

Bit 2 = Channel 2 alarm enable, 1 = enabled (default = 0)

Bit 1 = Channel 1 alarm enable, 1 = enabled (default = 0)

Bit 0 = Channel 0 alarm enable, 1 = enabled (default = 0)

Product Folder Link(s): ADS7924