UM10462
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© NXP B.V. 2016. All rights reserved.
User manual
Rev. 5.5 — 21 December 2016
327 of 523
NXP Semiconductors
UM10462
Chapter 14: LPC11U3x/2x/1x I2C-bus controller
5. Set up Master Receive mode data buffer.
6. Initialize Master data counter.
7. Exit
14.11.5.4 State: 0x10
A Repeated START condition has been transmitted. The Slave A R/W bit will be
transmitted, 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. Exit
14.11.6 Master Transmitter states
14.11.6.1 State: 0x18
Previous state was State 8 or State 10, Slave A Write has been transmitted, ACK
has 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. Exit
14.11.6.2 State: 0x20
Slave A Write has been transmitted, NOT ACK has been received. A STOP
condition 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. Exit
14.11.6.3 State: 0x28
Data has been transmitted, ACK has been received. If the transmitted data was the last
data 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. Exit
5. Load DAT with next data byte from Master Transmit buffer.
