SM9541-010C-S-C-213-S Datasheet, PDF (5/11 Pages) List of Unclassifed Manufacturers – Ultra-Low Pressure Digital Sensor

• I2C Read_MR – Measurement Request:
o Slave starts a measurement and DSP calculation cycle.
o Start Condition – Device Slave Address [6:0] – Read/Write Bit (Read = 1) – Wait for Slave ACK – Stop Condition
S6543210RAS
• I2C Read_DF2 – Data Fetch 2 Bytes:
o Slave returns only pressure data to the master in 2 bytes.
o Start Condition – Device Slave Address [6:0] – Read/Write Bit (Read = 1) – Wait for Slave ACK – 2 status bits – 6 pressure
bits [13:8] – Master ACK – 8 pressure bits [7:0] – Master NACK – Stop Condition
S 6 5 4 3 2 1 0 R A 15 14 13 12 11 10 9 8 A 7 6 5 4 3 2 1 0 N S
o I2C Read_DF3 – Data Fetch 3 Bytes:
Slave returns 2 pressure data bytes and temperature high byte [10:3] to the master.
Start Condition – Device Slave Address [6:0] – Read/Write Bit (Read = 1) – Wait for Slave ACK – 2 status bits – 6 pressure
bits [13:8] – Master ACK – 8 pressure bits [7:0] – Master ACK – 8 temperature bits [10:3] – Master NACK – Stop Condition
S 6 5 4 3 2 1 0 R A 15 14 13 12 11 10 9 8 A 7 6 5 4 3 2 1 0 A 10 9 8 7 6 5 4 3 N S
• I2C Read_DF4 – Data Fetch 4 Bytes:
o Slave returns 2 pressure data bytes and and 2 temperature bytes ([10:3] and [2:0]xxxxx) to the master.
o Start Condition – Device Slave Address [6:0] – Read/Write Bit (Read = 1) – Wait for Slave ACK – 2 status bits – 6 pressure
bits [13:8] – Master ACK – 8 pressure bits [7:0] – Master ACK – 8 temperature bits [10:3] – Master ACK – 3 temperature
bits [3:0] – Master NACK – Stop Condition
S 6 5 … 1 0 R A 15 14 13 12 … 9 8 A 7 6 … 1 0 A 10 9 … 4 3 A 2 1 0 x x x x x N S