AS7265X datasheet(24/64 Pages) OSRAM

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ams Datasheet

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[v1-04] 2018-Jul-09

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AS7265x − Detailed Description

If BANK is set in the AS72651 to Mode 0 or Mode 1, data is ready

after the 1st integration time. If BANK is set to Mode 2, data is

ready after two integration times.

For interrupt operation using I²C registers, if interrupts are en-

abled and data is ready, the INT pin is set low and DATA_RDY is

set to 1. Reading the raw or calibration data releases (returns

high) the interrupt. For multi-byte sensor data (2 or 4 bytes),

after the 1st byte is read the remaining bytes are shadow pro-

tected in case an integration cycle completes just after the 1st

byte is read. The sensors continue to gather information at the

rate of the integration time, hence if the sensor registers are not

read when the interrupt line goes low, it will stay low and the

next cycle’s sensor data will be available in the registers at the

end of the next integration cycle.

For interrupt operation using AT Commands, if interrupts are

enabled and data is ready the INT pin is set low and is released

(returns high) after any sensor data is read.

Required Flash Memory

Serial flash is a required operating companion for this device,

and enables the I²C and UART interfaces, as well as enabling

calibrated data results. Supported device types are noted in

Ordering & Contact Information at the end of this document.

Required operating code can be downloaded at

download.ams.com.

I²C Slave Interface

If selected by the I2C_ENB pin setting, interface and control can

be accomplished through an I²C compatible slave interface to

a set of registers that provide access to device control functions

and output data. These registers on the AS72651 are, in reality,

implemented as virtual registers in software. The actual I²C slave

hardware registers number only three and are described in the

table below. The steps necessary to access the virtual registers

defined in the following are explained in pseudocode for exter-

nal I²C master writes and reads below.

I²C Feature List

• Fast mode (400kHz).

• 7+1-bit addressing mode.

• Write format: Byte.

• Read format: Byte.

• SDA input delay and SCL spike filtering by integrated

RC-components.

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