AS6200 datasheet(20/35 Pages) AMSCO

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[v1-01] 2016-Jun-17

AS6200 − Detailed Descriptions

Slave Operation

The device employs a slave functionality only (slave transmitter

and slave receiver) and cannot be operated as a bus master.

Consequently, the device never actively drives the SCL line.

Slave Receiver Mode

Any transmission is invoked by the master device by

transmitting the slave address with a low R/W bit. Subsequently,

the slave device acknowledges the reception of the valid

address by pulling the ninth bit to a low level. Following to

acknowledge, the master transmits the content of the index

device. The next data byte(s) are written to the actual data

transfer is acknowledged upon a completed transfer by the

slave device. A data transfer can be finished if the master

transmits a START or a STOP condition on the bus.

Slave Transmitter Mode

The master transmits the slave address with a high R/W bit. In

turn, the slave acknowledges a valid slave address.

Subsequently, the slave transmits the MSB byte of the actual

selected data register by the index register. After the MSB byte

transmission, acknowledge is sent by the master. Afterwards,

the LSB byte is transmitted by the slave which is also

acknowledged by the master after the completed transmission.

The data transfer can be terminated by the master by

transmitting a Not-Acknowledge after the transmitted slave

data or by invoking a START or a STOP condition on the bus.

Alert Function

If the device is configured for an interrupt mode operation

(IM=1), the ALERT output can be used as an alert signal.

If the polarity bit is set to ‘0’ (POL=’0’), the alert condition bit is

set to ‘0’ in case the temperature has exceeded the configured

value in register THIGH. Accordingly, the alert condition bit is

set to ‘1’ if the temperature has fallen below the configured

value in register TLOW.

If the polarity bit is set to ‘1’ (POL=’1’), the alert condition bit is

inverted. The following table summarizes the status of the alert

condition bit with different alert conditions and polarity

configurations.

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