Datasheet

LPC2377_78 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6.1 — 16 October 2013 26 of 69
NXP Semiconductors
LPC2377/78
Single-chip 16-bit/32-bit microcontrollers
7.17 SSP serial I/O controller
The LPC2377/78 contain two SSP controllers. The SSP controller is capable of operation
on a SPI, 4-wire SSI, or Microwire bus. It can interact with multiple masters and slaves on
the bus. Only a single master and a single slave can communicate on the bus during a
given data transfer. The SSP supports full duplex transfers, with frames of 4 bits to 16 bits
of data flowing from the master to the slave and from the slave to the master. In practice,
often only one of these data flows carries meaningful data.
7.17.1 Features
• Compatible with Motorola SPI, 4-wire TI SSI, and National Semiconductor Microwire
buses
• Synchronous serial communication
• Master or slave operation
• 8-frame FIFOs for both transmit and receive
• 4-bit to 16-bit frame
• DMA transfers supported by GPDMA
7.18 SD/MMC card interface
The Secure Digital and Multimedia Card Interface (MCI) allows access to external SD
memory cards. The SD card interface conforms to the SD Multimedia Card Specification
Version 2.11.
7.18.1 Features
• The MCI provides all functions specific to the SD/MMC memory card. These include
the clock generation unit, power management control, and command and data
transfer.
• Conforms to Multimedia Card Specification v2.11.
• Conforms to Secure Digital Memory Card Physical Layer Specification, v0.96.
• Can be used as a multimedia card bus or a secure digital memory card bus host. The
SD/MMC can be connected to several multimedia cards or a single secure digital
memory card.
• DMA supported through the GPDMA controller.
7.19 I
2
C-bus serial I/O controllers
The LPC2377/78 contain three I
2
C-bus controllers.
The I
2
C-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 (e.g., 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 I
2
C-bus is a multi-master bus and can
be controlled by more than one bus master connected to it.
The I
2
C-bus implemented in LPC2377/78 supports bit rates up to 400 kbit/s (Fast
I
2
C-bus).