AS6200 datasheet(21/35 Pages) AMSCO

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ams Datasheet

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[v1-01] 2016-Jun-17

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AS6200 − Detailed Descriptions

Figure 28:

Alert Condition Bit

General Call

A general call is issued by the master by transmitting the

general call address (000 0000) with a low R/W bit. The slave

device acknowledges the general call address and responds to

commands in the second byte. If the master transmits a value

of 0000 0110 as a second byte, the device is reset and all

registers are initialized with their default values.

In contrast to the General Call Address, the General Address

Acquire command is not supported.

High Speed Mode

The bus operation is limited to 400kHz unless a high speed

command is issued by the master device as the first byte after

a START condition. This switches the bus to a high speed

operation which allows data transfer frequencies up to 3.4MHz.

Such a command is not acknowledged by the slave but the

input filter time constants on the serial interface (SDA and SCL)

are adapted to allow the higher transfer rate.

After a high speed command, the slave address is transmitted

by the master in order to invoke a data transfer. The bus keeps

operating at the higher operating frequency until the master

issues a STOP condition on the serial bus. Upon the reception

of the STOP condition by the slave, the input filters are switched

to their initial time constants which allow lower transfer rates

only.

POL

Alert Condition

Alert Condition Bit

(AC-Bit)

≥ THIGH

0T ≤ TLOW

≥ THIGH

1T ≤ TLOW

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