UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 19 December 2013 468 of 841
NXP Semiconductors
UM10360
Chapter 19: LPC176x/5x I2C0/1/2
1. Write 0x14 to I2CONSET to set the STO and AA bits.
2. Write 0x08 to I2CONCLR to clear the SI flag.
3. Exit
19.10.5.2 Master States
State 0x08 and State 0x10 are for both Master Transmit and Master Receive modes. The
R/W bit decides whether the next state is within Master Transmit mode or Master Receive
mode.
19.10.5.3 State: 0x08
A START condition has been transmitted. The Slave Address + R/W bit will now be
transmitted.
1. Write Slave Address with R/W bit to I2DAT.
2. Write 0x04 to I2CONSET to set the AA bit.
3. Write 0x08 to I2CONCLR 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
19.10.5.4 State: 0x10
A repeated START condition has been transmitted. The Slave Address + R/W bit will now
be transmitted.
1. Write Slave Address with R/W bit to I2DAT.
2. Write 0x04 to I2CONSET to set the AA bit.
3. Write 0x08 to I2CONCLR 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
19.10.6 Master Transmitter states
19.10.6.1 State: 0x18
Previous state was State 0x08 or State 0x10, Slave Address + Write has been transmitted,
ACK has been received. The first data byte will be transmitted.
1. Load I2DAT with first data byte from Master Transmit buffer.
2. Write 0x04 to I2CONSET to set the AA bit.
3. Write 0x08 to I2CONCLR to clear the SI flag.
4. Increment Master Transmit buffer pointer.
5. Exit
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