米6体育平台手机版

DLPU115 January 2022 DLPC3421

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1.2.2 I²C Transactions

Since all I²C commands are processed by software, only one type of I²C transaction is supported. This transaction type is shown in Table 1-1 for both writes and reads. The I²C interface supports variably-sized transactions (for example, a one byte transaction or a nine byte transaction) to match the commands discussed later in this document.

Table 1-1 I²C Write and Read Transactions

Transaction		Address⁽¹⁾	Sub-Address⁽²⁾	Remaining Data Bytes⁽³⁾
Write	Size	8-bits	8-bits	8-bit parameter bytes (0 → N)
Write	Value	36h (or 3Ah)	Command value	Parameter values
Read Request	Size	8-bits	8-bits	8-bit parameter bytes (0 → N)
Read Request	Value	36h (or 3Ah)	Command value	Parameter values
Read Response	Size	8-bits		8-bit parameter bytes (0 → N)
Read Response	Value	37h (or 3Bh)		Parameter values

(1) The address corresponds to the chip address of the controller. The address is dependent upon the firmware image with the default value of 36h.

(2) The subaddress corresponds to a TI command.

(3) The data (if present) corresponds to any required command parameters.

1.2.2 I2C Transactions

1.2.2 I²C Transactions