NXP Semiconductors LPC43 Series User Manual

Contents

NXP Semiconductors LPC43 Series User Manual Manual pdf 1148 page image

UM10503 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.User manual Rev. 1.3 — 6 July 2012 1148 of 1269NXP Semiconductors UM10503Chapter 43: LPC43xx I2C-bus interface5. Set up Master Receive mode data buffer.6. Initialize Master data counter.7. Exit43.11.5.4 State: 0x10A Repeated START condition has been transmitted. The Slave Address + R/W bit will betransmitted, an ACK bit will be received.1. Write Slave Address with R/W bit to DAT.2. Write 0x04 to CONSET to set the AA bit.3. Write 0x08 to CONCLR to clear the SI flag.4. Set up Master Transmit mode data buffer.5. Set up Master Receive mode data buffer.6. Initialize Master data counter.7. Exit43.11.6 Master Transmitter states43.11.6.1 State: 0x18Previous state was State 8 or State 10, Slave Address + Write has been transmitted, ACKhas been received. The first data byte will be transmitted, an ACK bit will be received.1. Load DAT with first data byte from Master Transmit buffer.2. Write 0x04 to CONSET to set the AA bit.3. Write 0x08 to CONCLR to clear the SI flag.4. Increment Master Transmit buffer pointer.5. Exit43.11.6.2 State: 0x20Slave Address + Write has been transmitted, NOT ACK has been received. A STOPcondition will be transmitted.1. Write 0x14 to CONSET to set the STO and AA bits.2. Write 0x08 to CONCLR to clear the SI flag.3. Exit43.11.6.3 State: 0x28Data has been transmitted, ACK has been received. If the transmitted data was the lastdata byte then transmit a STOP condition, otherwise transmit the next data byte.1. Decrement the Master data counter, skip to step 5 if not the last data byte.2. Write 0x14 to CONSET to set the STO and AA bits.3. Write 0x08 to CONCLR to clear the SI flag.4. Exit5. Load DAT with next data byte from Master Transmit buffer.