SPMCK16Z4MPV20 datasheet(241/500 Pages) FREESCALE

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M68HC16 Z SERIES

MULTICHANNEL COMMUNICATION INTERFACE

USER’S MANUAL

10-1

SECTION 10

MULTICHANNEL COMMUNICATION INTERFACE

This section is an overview of the multichannel communication interface (MCCI) mod-

ule. Refer to the

MCCI Reference Manual (MCCIRM/AD) for more information on

MCCI capabilities. Refer to APPENDIX A ELECTRICAL CHARACTERISTICS for

MCCI timing and electrical specifications. Refer to D.7 Multichannel Communication

Interface Module for register address mapping and bit/field definitions.

10.1 General

The MCCI contains three serial interfaces: a serial peripheral interface (SPI) and two

serial communication interfaces (SCI). Figure 10-1 is a block diagram of the MCCI.

The MCCI is present only on MC68HC16Z4 and MC68CK16Z4 microcontrollers.

Figure 10-1 MCCI Block Diagram

The SPI provides easy peripheral expansion or interprocessor communication via a

full-duplex, synchronous, three-line bus: data in, data out, and a serial clock. Serial

transfer of eight or sixteen bits can begin with the most significant bit (MSB) or least

significant bit (LSB). The MCCI module can be configured as a master or slave device.

Clock control logic allows a selection of clock polarity and a choice of two clocking pro-

tocols to accommodate most available synchronous serial peripheral devices. When

the SPI is configured as a master, software selects one of 254 different bit rates for the

serial clock.

MCCI BLOCK

INTERMODULE BUS (IMB)

BUS INTERFACE UNIT

SERIAL PERIPHERAL INTERFACE (SPI)

SERIAL COMMUNICATION INTERFACE (SCIB)

SERIAL COMMUNICATION INTERFACE (SCIA)

PORT

MCCI

PMC0/MISO

PMC1/MOSI

PMC2/SCK

PMC3/SS

PMC4/RXDB

PMC5/TXDB

PMC6/RXDA

PMC7/TXDA

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