UM10562 Datasheet, PDF (405/942 Pages) NXP Semiconductors – LPC408x/407x User manual

NXP Semiconductors
UM10562
Chapter 14: LPC408x/407x USB OTG controller
14.8.10 I²C Control Register
The I2C_CTL register is used to enable interrupts and reset the I²C state machine.
Enabled interrupts cause the USB_I2C_INT interrupt output line to be asserted when set.
Table 322. I²C Control register (I2C_CTL - address 0x2008 C308) bit description
Bit Symbol Value Description
0 TDIE
Transmit Done Interrupt Enable. This enables the TDI interrupt signalling that this I²C
issued a STOP condition.
Reset
Value
0
0 Disable the TDI interrupt.
1 Enable the TDI interrupt.
1 AFIE
Transmitter Arbitration Failure Interrupt Enable. This enables the AFI interrupt which is
0
asserted during transmission when trying to set SDA high, but the bus is driven low by
another device.
0 Disable the AFI.
1 Enable the AFI.
2 NAIE
Transmitter No Acknowledge Interrupt Enable. This enables the NAI interrupt signalling
0
that transmitted byte was not acknowledged.
0 Disable the NAI.
1 Enable the NAI.
3 DRMIE
Master Transmitter Data Request Interrupt Enable. This enables the DRMI interrupt which 0
signals that the master transmitter has run out of data, has not issued a STOP, and is
holding the SCL line low.
0 Disable the DRMI interrupt.
1 Enable the DRMI interrupt.
4 DRSIE
Slave Transmitter Data Request Interrupt Enable. This enables the DRSI interrupt which
0
signals that the slave transmitter has run out of data and the last byte was acknowledged,
so the SCL line is being held low.
0 Disable the DRSI interrupt.
1 Enable the DRSI interrupt.
5 REFIE
Receive FIFO Full Interrupt Enable. This enables the Receive FIFO Full interrupt to
0
indicate that the receive FIFO cannot accept any more data.
0 Disable the RFFI.
1 Enable the RFFI.
6 RFDAIE
Receive Data Available Interrupt Enable. This enables the DAI interrupt to indicate that
0
data is available in the receive FIFO (i.e. not empty).
0 Disable the DAI.
1 Enable the DAI.
7 TFFIE
Transmit FIFO Not Full Interrupt Enable. This enables the Transmit FIFO Not Full interrupt 0
to indicate that the more data can be written to the transmit FIFO. Note that this is not full.
It is intended help the CPU to write to the I²C block only when there is room in the FIFO
and do this without polling the status register.
0 Disable the TFFI.
1 Enable the TFFI.
UM10562
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 13 September 2012
© NXP B.V. 2012. All rights reserved.
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