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AS6204

Register Description

Datasheet

• PUBLIC

DS000628

• v4-00 • 2021-Oct-18

36

│ 13

The configuration register is a 16-bit register, which defines the operation modes of the device. Any

read/write operations processes the MSB byte first.

In Figure 11 the configuration register is shown. The bits 0-4 and 13-14 are not to be used and are set

to read only (RO). The bit 4 is reserved (RW) and must not be changed from the default value. The

explanation of the other bits are described in detail in the following sections.

6.2.2

Alert Bit

The alert bit can be used to easily compare the current temperature reading to the thresholds that can

be set in the TLOW and THIGH registers.

If the polarity bit is set to 0, the AL bit is read as 1 until the converted temperature value exceeds the

defined value in the high temperature threshold register THIGH for the number of defined consecutive

faults (bits CF). Such an event causes the AL bit to toggle to 0 and the value is kept until the

converted temperature value falls below the defined value in the low temperature threshold register

TLOW for the number of defined consecutive faults. If this condition is met, the AL bit is reset to 1.

The polarity bit (POL) defines the active state of the alert bit as depicted in the following figure.

The alert bit has the same setting as the alert output as long as the device is configured for the

comparator mode.

Figure 12:

State Diagram of the Alert Bit

6.2.3

Conversion Rate Bits

The conversion rate bits define the number of executed temperature conversions per time unit.

Additional readouts of the temperature register between conversions is possible but not recommended

because the value is changed only after a conversion is finished.

Values of 125 ms, 250 ms, 1 s and 4 s per conversion can be configured while the default rate is set to

250 ms. This corresponds to a value of four conversions per second. The following table summarizes

the different configuration settings: