Datasheet KT0803L (KT Micro) - 4
| Manufacturer | KT Micro |
| Description | Monolithic Digital Stereo FM Transmitter Radio-Station-on-a-Chip |
| Pages / Page | 23 / 4 — KT0803L. I2C Compatible 2-Wire Serial Interface. 3.1 General. Descriptions |
| File Format / Size | PDF / 771 Kb |
| Document Language | English |
KT0803L. I2C Compatible 2-Wire Serial Interface. 3.1 General. Descriptions
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KT0803L I2C Compatible 2-Wire Serial Interface 3.1 General Descriptions
The serial interface consists of a serial controller and registers. An internal address decoder transfers the content of the data into appropriate registers.
Please note that the I2C address is 0x 0111110 the same as in KT0803K and KT0803M. Neither software nor hardware change is needed if KT0803L is used to replace KT0803K and KT0803M.
Both the write and read operations are supported according to the following protocol:
Write Operations: BYTE WRITE:
The write operation is accomplished via a 3-byte sequence: Serial address with write command Register address Register data A write operation requires an 8-bit register address following the device address word and acknowledgment. Upon receipt of this address, the KT0803L will again respond with a “0” and then clock in the 8-bit register data. Following receipt of the 8-bit register data, the KT0803L will output a “0” and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition (see Figure 3).
Read Operations: RANDOM READ:
The read operation is accomplished via a 4-byte sequence: Serial address with write command Register address Serial address with read command Register data Once the device address and register address are clocked in and acknowledged by the KT0803L, the microcontroller must generate another start condition. The microcontroller now initiates a current address read by sending a device address with the read/write select bit high. The KT0803L acknowledges the device address and serially clocks out the register data. The microcontroller does not respond with a “0” but does generate a following stop condition (see Figure 3). RANDOM REGISTER WRITE PROCEDURE S 0 1 1
1
1 1 0 W A A A P 7 bit address register address data Acknowledge Acknowledge STOP condition START condition WRITE command Acknowledge RANDOM REGISTER READ PROCEDURE S 0 1 1
1
1 1 0 W A A S 0 1 1 1 1 1 0 R A A P 7 bit address register address 7 bit address data Acknowledge Acknowledge Acknowledge START condition WRITE command READ condition NO Acknowledge STOP condition
Figure 3: Serial Interface Protocol
Copyright ©2010, KT Micro, Inc. 4
The serial interface consists of a serial controller and registers. An internal address decoder transfers the content of the data into appropriate registers.
Please note that the I2C address is 0x 0111110 the same as in KT0803K and KT0803M. Neither software nor hardware change is needed if KT0803L is used to replace KT0803K and KT0803M.
Both the write and read operations are supported according to the following protocol:
Write Operations: BYTE WRITE:
The write operation is accomplished via a 3-byte sequence: Serial address with write command Register address Register data A write operation requires an 8-bit register address following the device address word and acknowledgment. Upon receipt of this address, the KT0803L will again respond with a “0” and then clock in the 8-bit register data. Following receipt of the 8-bit register data, the KT0803L will output a “0” and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition (see Figure 3).
Read Operations: RANDOM READ:
The read operation is accomplished via a 4-byte sequence: Serial address with write command Register address Serial address with read command Register data Once the device address and register address are clocked in and acknowledged by the KT0803L, the microcontroller must generate another start condition. The microcontroller now initiates a current address read by sending a device address with the read/write select bit high. The KT0803L acknowledges the device address and serially clocks out the register data. The microcontroller does not respond with a “0” but does generate a following stop condition (see Figure 3). RANDOM REGISTER WRITE PROCEDURE S 0 1 1
1
1 1 0 W A A A P 7 bit address register address data Acknowledge Acknowledge STOP condition START condition WRITE command Acknowledge RANDOM REGISTER READ PROCEDURE S 0 1 1
1
1 1 0 W A A S 0 1 1 1 1 1 0 R A A P 7 bit address register address 7 bit address data Acknowledge Acknowledge Acknowledge START condition WRITE command READ condition NO Acknowledge STOP condition
Figure 3: Serial Interface Protocol
Copyright ©2010, KT Micro, Inc. 4