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NTP53X2 Datasheet(PDF) 88 Page - NXP Semiconductors |
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NTP53X2 Datasheet(HTML) 88 Page - NXP Semiconductors |
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88 / 133 page  NXP Semiconductors NTP53x2 NTAG 5 link - NFC Forum-compliant I2C bridge NTP53x2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved. Product data sheet Rev. 3.3 — 3 July 2020 COMPANY PUBLIC 544533 88 / 133 aaa-035482 RF READER RF sends custom I2C read command. RF to I2C Master read communication sequences RF polls for I2C Master session registers to know the current I2C transaction status. IC stores the data in SRAM. IC initiates I2C transaction. I2C Master sends I2C read command to the specified slave address. RF reads data from SRAM. I2C INTERFACE Figure 8. I2C Master read principle 8.2.3.8.1 WRITE I2C Command code = D4h WRITE I2C command is used to trigger an I2C master write command (R/W bit is 0b) on the I2C bus. Command parameters: • I2C param contains I2C slave address and STOP condition option. • Data length N byte codes the length of bytes to be sent to the slave. N+1 bytes need to be put in the Data field and will be sent to the slave. E.g., to send one byte, 00h needs to be coded. • Data field contains the data to be sent to the I2C slave. Minimum number of bytes is 1 byte, maximum is 256 bytes. If SRAM is read or write protected a valid authentication needs to be preceded. Response to this command will follow immediately. To check the status and result of the WRITE I2C command, I2C Master Status Registers ADh should be checked (see Table 106). Only Option_flag = 0b is supported. Table 189. WRITE I2C request format Flags WRITE I2C Manuf. code UID I2C param Data length N Data CRC16 8 bits 8 bits 8 bits 64 bits (optional) 8 bits 8 bits (N+1) x 8 bits 16 bits Table 190. I2C param byte I2C param bit Status Value Description 0b STOP condition will be generated at the end of transaction 7 Disable STOP condition 1b STOP condition will be omitted at the end of transaction 6 to 0 I2C Address xxh 7-bit I2C slave address of connected slave |
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