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AN4650 Datasheet(PDF) 62 Page - STMicroelectronics |
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AN4650 Datasheet(HTML) 62 Page - STMicroelectronics |
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62 / 102 page  Mode 2 - sensor hub mode AN4650 62/102 DocID027415 Rev 1 6.2.7 SLV3_ADD (0Bh), SLV3_SUBADD (0Ch), SLAVE3_CONFIG (0Dh) The embedded function registers (accessible when the FUNC_CFG_EN bit of FUNC_CFG_ACCESS register is set to 1) used to configure the I2C slave interface associated to the fourth external sensor are described hereafter. Slave3_add[6:0] bits are used to indicate the I2C slave address of the fourth external sensor. r_3 bit enables/disables the read operation to be performed on the fourth external sensor (0: read operation disabled; 1: read operation enabled). The read operation is executed when the next sensor hub trigger event occurs. Slave3_reg[7:0] bits are used to indicate the address of the register of the fourth external sensor to be read when the r_3 bit of the SLV3_ADD register is set to 1. Slave3_rate[1:0] bits are used to define the decimation factor applied to read operations on the fourth external sensor starting from the sensor hub trigger: – 00: no decimation – 01: update every 2 sensor hub trigger events – 10: update every 4 sensor hub trigger events – 11: update every 8 sensor hub trigger events Slave3_numop[2:0] bits are dedicated to define the number of consecutive read operations to be performed on the fourth external sensor starting from the register address indicated in the SLV3_SUBADD register. Table 45. SLV3_ADD register b7 b6 b5 b4 b3 b2 b1 b0 Slave3 _add6 Slave3 _add5 Slave3 _add4 Slave3 _add3 Slave3 _add2 Slave3 _add1 Slave3 _add0 r_3 Table 46. SLV3_SUBADD register b7 b6 b5 b4 b3 b2 b1 b0 Slave3 _reg7 Slave3 _reg6 Slave3 _reg5 Slave3 _reg4 Slave3 _reg3 Slave3 _reg2 Slave3 _reg1 Slave3 _reg0 Table 47. SLAVE3_CONFIG register b7 b6 b5 b4 b3 b2 b1 b0 Slave3 _rate1 Slave3 _rate0 000 Slave3 _numop2 Slave3 _numop1 Slave3 _numop0 |
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