mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 265

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

12.1 General
MC68HC16Y3/916Y3
USER’S MANUAL
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.8 Multichannel Communication
Interface Module (MCCI) for register address mapping and bit/field definitions.
The MCCI contains three serial interfaces: a serial peripheral interface (SPI) and two
serial communication interfaces (SCI). On the MC68HC16Y3/916Y3, only the two SCI
subsystems are used; the SPI is not available. Instead, the QSPI from the queued se-
rial module (QSM) is used. Refer to SECTION 11 QUEUED SERIAL MODULE for
more information.
Figure 12-1 is a block diagram of the MCCI.
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 8 or 16 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 con-
trol logic allows a selection of clock polarity and a choice of two clocking protocols 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.
SECTION 12 MULTICHANNEL COMMUNICATION INTERFACE
SERIAL COMMUNICATION INTERFACE (SCIB)
SERIAL COMMUNICATION INTERFACE (SCIA)
SERIAL PERIPHERAL INTERFACE (SPI)
INTERMODULE BUS (IMB)
BUS INTERFACE UNIT
MULTICHANNEL COMMUNICATION INTERFACE
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 12-1 MCCI Block Diagram
Go to: www.freescale.com
PORT
MCCI
PMC0/MISO
PMC1/MOSI
PMC2/SCK
PMC3/SS
PMC4/RXDB
PMC5/TXDB
PMC6/RXDA
PMC7/TXDA
MCCI BLOCK
MOTOROLA
12-1