Datasheet KT0803L (KT Micro) - 5
| Manufacturer | KT Micro |
| Description | Monolithic Digital Stereo FM Transmitter Radio-Station-on-a-Chip |
| Pages / Page | 23 / 5 — KT0803L. CURRENT ADDRESS READ:. Figure 4: Serial Interface Protocol. … |
| File Format / Size | PDF / 771 Kb |
| Document Language | English |
KT0803L. CURRENT ADDRESS READ:. Figure 4: Serial Interface Protocol. Note:. 3.2 Slave. Mode. Protocol
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KT0803L CURRENT ADDRESS READ:
The internal data register address counter maintains the last address accessed during the last read or write operation, incremented by one. This address stays valid between operations as long as the chip power is maintained. Once the device address with the read/write select bit set to “1” is clocked in and acknowledged by the KT0803L, the current address data word is serially clocked out. The microcontroller does not respond with an input “0” but does generate a following stop condition (see Figure 4). CURRENT REGISTER READ PROCEDURE S 0 1 1
1
1 1 0 R A A P 7 bit address data Acknowledge STOP condition START condition READ command NO Acknowledge
Figure 4: Serial Interface Protocol Note:
The serial controller supports slave mode only. Any register can be addressed randomly. The address of the slave in the first 7 bits and the 8th bit tells whether the master is receiving data from the slave or transmitting data to the slave. The I2C write address is 0x7C and the read address is 0x7D.
3.2 Slave Mode Protocol
With reference to the clocking scheme shown in Figure 5, the serial interface operates in the following manner:
Figure 5: Serial Interface Slave Mode Protocol CLOCK and DATA TRANSITIONS:
The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods (see Figure 6). Data changes during SCL high periods will indicate a start or stop condition as defined below.
START CONDITION:
A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (see Figure 7).
STOP CONDITION:
A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command will place the KT0803L in a standby power mode (see Figure 7).
ACKNOWLEDGE:
All addresses and data words are serially transmitted to and from the KT0803L in 8- bit words. The KT0803L sends a “0” to acknowledge that it has received each word. This happens during the ninth clock cycle (see Figure 8). Copyright ©2010, KT Micro, Inc. 5
The internal data register address counter maintains the last address accessed during the last read or write operation, incremented by one. This address stays valid between operations as long as the chip power is maintained. Once the device address with the read/write select bit set to “1” is clocked in and acknowledged by the KT0803L, the current address data word is serially clocked out. The microcontroller does not respond with an input “0” but does generate a following stop condition (see Figure 4). CURRENT REGISTER READ PROCEDURE S 0 1 1
1
1 1 0 R A A P 7 bit address data Acknowledge STOP condition START condition READ command NO Acknowledge
Figure 4: Serial Interface Protocol Note:
The serial controller supports slave mode only. Any register can be addressed randomly. The address of the slave in the first 7 bits and the 8th bit tells whether the master is receiving data from the slave or transmitting data to the slave. The I2C write address is 0x7C and the read address is 0x7D.
3.2 Slave Mode Protocol
With reference to the clocking scheme shown in Figure 5, the serial interface operates in the following manner:
Figure 5: Serial Interface Slave Mode Protocol CLOCK and DATA TRANSITIONS:
The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods (see Figure 6). Data changes during SCL high periods will indicate a start or stop condition as defined below.
START CONDITION:
A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (see Figure 7).
STOP CONDITION:
A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop command will place the KT0803L in a standby power mode (see Figure 7).
ACKNOWLEDGE:
All addresses and data words are serially transmitted to and from the KT0803L in 8- bit words. The KT0803L sends a “0” to acknowledge that it has received each word. This happens during the ninth clock cycle (see Figure 8). Copyright ©2010, KT Micro, Inc. 5