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ISD5116 Datasheet(PDF) 11 Page - Winbond |
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ISD5116 Datasheet(HTML) 11 Page - Winbond |
11 / 57 page October 2000 Page 10 9. Slave responds with Lower Address byte of internal address register (A[4:0] will always return set to 0.) 10. Host sends a NO ACK to Slave, then executes I 2C STOP Note that the processor could have sent an I 2C STOP after the Status Word data transfer and aborted the transfer of the Address bytes. A graphical representation of this operation is found below. See the caption box above for more explanation. 2. LOAD COMMAND BYTE REGISTER (SINGLE BYTE LOAD): A single byte may be written to the Command Byte Register in order to power up the device, start or stop Analog Record (if no address information is needed), or do a Message Cueing function. The Command Byte Register is loaded as follows: 1. Host executes I 2C START 2. Send Slave Address with R/W bit = “0” (Write) [80h] 3. Slave responds back with an ACK. 4. Wait for SCL to go HIGH 5. Host sends a command byte to Slave 6. Slave responds with an ACK 7. Wait for SCL to go HIGH 8. Host executes I 2C STOP 3. LOAD COMMAND BYTE REGISTER (ADDRESS LOAD): For the normal addressed mode the Registers are loaded as follows: 1. Host executes I 2C START 2. Send Slave Address with R/W bit = “0” (Write) 3. Slave responds back with an ACK. 4. Wait for SCL to go HIGH 5. Host sends a byte to Slave - (Command Byte) 6. Slave responds with an ACK 7. Wait for SCL to go HIGH 8. Host sends a byte to Slave - (High Address Byte) 9. Slave responds with an ACK 10. Wait for SCL to go HIGH 11. Host sends a byte to Slave - (Low Address Byte) 12. Slave responds with an ACK 13. Wait for SCL to go HIGH 14. Host executes I 2C STOP S SLAVE ADDRESS A A DATA P R DATA DATA A N Status High Addr. Low Addr. S SLAVE ADDRESS A DATA P W Command Byte A S SLAVE ADDRESS A P W Command DATA A DATA A DATA A High Addr. Low Addr. |
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