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PI4IOE5V9570 Datasheet(PDF) 6 Page - Pericom Semiconductor Corporation |
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PI4IOE5V9570 Datasheet(HTML) 6 Page - Pericom Semiconductor Corporation |
6 / 11 page |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||| ||||||||||||||||| 2015-07-0044 PT0559 08/05/15 6 PI4IOE5V9570 4-bit general purpose outputs for 1MHz I 2C bus PI4IOE5V9570 Block Diagram Details Description a. Device Address b7(MSB) b6 b5 b4 b3 b2 b1 b0 Address Byte 0 1 0 0 1 0 0 R/W b. Software Reset Call General Call address: allows resetting the device through the I 2C-bus upon reception of the right I2C-bus sequence. b7(MSB) b6 b5 b4 b3 b2 b1 b0 General Call Address 0 0 0 0 0 0 0 0 c. Software Reset The Software Reset Call allows all the devices in the I 2C-bus to be reset to the power-up state value through a specific formatted I 2C-bus command. To be performed correctly, it implies that the I2C-bus is functional and that there is no device hanging the bus. The Software Reset sequence is defined as following: 1. A START command is sent by the I 2C-bus master. 2. The reserved General Call I 2C-bus address ‘0000 000’ with the R/W bit set to 0 (write) is sent by the I2C-bus master. 3. The device acknowledges after seeing the General Call address ‘0000 0000’ (00h) only. If the R/W bit is set to 1 (read), no acknowledge is returned to the I 2C-bus master. 4. Once the General Call address has been sent and acknowledged, the master sends 1 byte. The value of the byte must be equal to 06h. a. The device acknowledges this value only. If the byte is not equal to 06h, the device does not acknowledge it. Fig 3: Block diagram of PI4IOE5V9570 |
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