LPC540xx
NXP Semiconductors
32-bit ARM Cortex-M4 microcontroller
7.14.8.2 SPI serial I/O controller
Features
• Maximum data rates of 48 Mbit/s in master mode and 14 Mbit/s in slave mode for SPI
functions. (Flexcomm Interface 0-9).
• Maximum data rates of 50 Mbit/s in master mode and 50 Mbit/s in slave mode for SPI
functions (Flexcomm Interface10).
• Data frames of 1 to 16 bits supported directly. Larger frames supported by software or
DMA set-up.
• Master and slave operation.
• Data can be transmitted to a slave without the need to read incoming data. This can
be useful while setting up an SPI memory.
• Control information can optionally be written along with data. This allows very
versatile operation, including “any length” frames.
• Four Slave Select input/outputs with selectable polarity and flexible usage.
• Activity on the SPI in slave mode allows wake-up from deep-sleep mode on any
enabled interrupt.
Remark: Texas Instruments SSI and National Microwire modes are not supported.
7.14.8.3 I2C-bus interface
The I2C-bus is bidirectional for inter-IC control using only two wires: a serial clock line
(SCL) and a serial data line (SDA). Each device is recognized by a unique address and
can operate as either a receiver-only device (for example, an LCD driver) or a transmitter
with the capability to both receive and send information (such as memory). Transmitters
and/or receivers can operate in either master or slave mode, depending on whether the
chip has to initiate a data transfer or is only addressed. The I2C is a multi-master bus and
can be controlled by more than one bus master connected to it.
Features
• All I2Cs support standard, Fast-mode, and Fast-mode Plus with data rates of up to
1 Mbit/s.
• All I2Cs support high-speed slave mode with data rates of up to 3.4 Mbit/s.
• Independent Master, Slave, and Monitor functions.
• Supports both Multi-master and Multi-master with Slave functions.
• Multiple I2C slave addresses supported in hardware.
• One slave address can be selectively qualified with a bit mask or an address range in
order to respond to multiple I2C-bus addresses.
• 10-bit addressing supported with software assist.
• Supports SMBus.
• Activity on the I2C in slave mode allows wake-up from deep-sleep mode on any
enabled interrupt.
LPC540xx
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© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 1.8 — 22 June 2018
73 of 168
NXP [ NXP ]
