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AS7225 Datasheet(PDF) 21 Page - OSRAM GmbH

Part # AS7225
Description  Calibrated XYZ Chromatic Smart Lighting Director
PDF  76 Pages
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Manufacturer  OSRAM [OSRAM GmbH]
Direct Link  http://www.osram.com
Logo OSRAM - OSRAM GmbH

AS7225 Datasheet(HTML) 21 Page - OSRAM GmbH

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AS7225
I²C Slave Interface
Datasheet
• PUBLIC
DS000496
• v2-00 • 2019-Jun-28
75
│ 20
// Read slave I2C status to see if the write buffer is ready.
status = i2cm_read(I2C_AS72XX_SLAVE_STATUS_REG) ;
if ((status & I2C_AS72XX_SLAVE_TX_VALID) == 0)
// No inbound TX pending at slave. Okay to write now.
break ;
}
// Send the virtual register address (setting bit 7 to indicate a pending
write).
i2cm_write(I2C_AS72XX_SLAVE_WRITE_REG, (virtualReg | 0x80)) ;
while (1)
{
// Read the slave I2C status to see if the write buffer is ready.
Status = i2cm_read(I2C_AS72XX_SLAVE_STATUS_REG) ;
if ((status & I2C_AS72XX_SLAVE_TX_VALID) == 0)
// No inbound TX pending at slave. Okay to write data now.
break ;
}
// Send the data to complete the operation.
i2cm_write(I2C_AS72XX_SLAVE_WRITE_REG, d) ;
}
8.3
I²C Virtual Register Read Access
I²C Virtual Register Byte Read, detailed below, shows the pseudocode necessary to read virtual
registers on the AS7225. Note that in this case, reading a virtual register, the register address is not
modified.



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