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PAS109BCL-32 Datasheet(PDF) 7 Page - Pixart Imaging Inc. |
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PAS109BCL-32 Datasheet(HTML) 7 Page - Pixart Imaging Inc. |
7 / 15 page PixArt Imaging Inc. PAS109B CMOS Image Sensor IC All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission. 7 PixArt Imaging Inc. E-mail: fae_service@pixart.com.tw V1.1, Mar. 2002 Fig 5.2 Valid Data 5.2 Data Transfer Format 5.2.1 Master transmits data to slave (write cycle) S : Start A : Acknowledge by slave P : Stop RW : The LSB of 1 ST byte to decide whether current cycle is read or write cycle. RW=1 read cycle, RW=0 write cycle. SUBADDRESS : The address values of PAS109B internal control registers (Please refer to PAS109B register description) During write cycle, the master generates start condition and then places the 1 st byte data that are combined slave address (7 bits) with a read/write control bit to SDA line. After slave(PAS109B) issues acknowledgment, the master places 2 nd byte (sub-address) data on SDA line. Again follow the PAS109B acknowledgment, the master places the 8 bits data on SDA line and transmit to PAS109B control register (address was assigned by 2 nd byte). After PAS109B issue acknowledgment, the master can generate a stop condition to end of this write cycle. In the condition of multi-byte write, the PAS109B sub-address is automatically increment after each DATA byte transferred. The data and A cycles is repeat until last byte write. Every control registers value inside PAS109B can be programming via this way. (Please refer to Fig 5.3.) S SLAVE ID (7 BIT) RW A SUBADDRESS (8 BIT) A DATA P A 1ST BYTE 2ND BYTE n BYTEs + A MSB LSB=0 A DATA DATA STABLE DATA CHANGE ALLOWED SDA SCL |
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