UM10211 - Standard ICs

NXP Semiconductors
UM10211
Chapter 19: LPC2300 I 2 C0, I 2 C1, I 2 C2
1. Write 0x04 to I2CONSET to set the AA bit.
2. Write 0x08 to I2CONCLR to clear the SI flag.
3. Exit
9.10 Slave Transmitter States
9.10.1 State : 0xA8
Own Slave Address + Read has been received, ACK has been returned. Data will be
transmitted, ACK bit will be received.
1. Load I2DAT from Slave Transmit buffer with first data byte.
2. Write 0x04 to I2CONSET to set the AA bit.
3. Write 0x08 to I2CONCLR to clear the SI flag.
4. Set up Slave Transmit mode data buffer.
5. Increment Slave Transmit buffer pointer.
6. Exit
9.10.2 State : 0xB0
Arbitration lost in Slave Address and R/W bit as bus Master. Own Slave Address + Read
has been received, ACK has been returned. Data will be transmitted, ACK bit will be
received. STA is set to restart Master mode after the bus is free again.
1. Load I2DAT from Slave Transmit buffer with first data byte.
2. Write 0x24 to I2CONSET to set the STA and AA bits.
3. Write 0x08 to I2CONCLR to clear the SI flag.
4. Set up Slave Transmit mode data buffer.
5. Increment Slave Transmit buffer pointer.
6. Exit
9.10.3 State : 0xB8
Data has been transmitted, ACK has been received. Data will be transmitted, ACK bit will
be received.
1. Load I2DAT from Slave Transmit buffer with data byte.
2. Write 0x04 to I2CONSET to set the AA bit.
3. Write 0x08 to I2CONCLR to clear the SI flag.
4. Increment Slave Transmit buffer pointer.
5. Exit
9.10.4 State : 0xC0
Data has been transmitted, NOT ACK has been received. Not addressed Slave mode is
entered.
1. Write 0x04 to I2CONSET to set the AA bit.
2. Write 0x08 to I2CONCLR to clear the SI flag.
UM10211_1
© NXP B.V. 2007. All rights reserved.
User manual Rev. 01 — 27 March 2007 449 of 613