MC68HC55D
Description
of the DSI System * * * Reduction of intermodule wiring by using a 2-conductor bus. Provide power to remote nodes on the same pair of wires Self-organizing system (modules need not be programmed prior to installation) No critical timing components such as crystals in remote nodes (subject to damage in a crash) Wave shaped signals to minimize electrical noise CRC error checking on all messages to assure message integrity 1.3 Overall DSI System Connections The DSI system consists of: * Master MCU such as the MC68HC16P3 One or more DSI/D devices, one DSI/P dual analog SmartMOS device per DSI/D Up to 15 remote sensor and firing units per DSI bus In this DSI system, the master MCU will communicate with the DSI/D via the SPI.
Key Features
- Compact 16-pin narrow body SOIC (small outline integrated circuit) package Compatible with Freescale SPI (serial peripheral interface) communication interface Compatible with DSI/P analog ASIC Two independent DSI channels Pin assignments match DSI/P for easy connection Automatic CRC (cyclical redundancy check) generation and checking for robust message verification 4-stage transmit and receive FIFOs (first in, first out) 8-bit or 16-bit messages, plus 4-bit CRC SmartMOS is a trademark of Freescale Semiconductor, Inc. Technical Data 2
