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HC705E5GRS/D Datasheet(PDF) 8 Page - NXP Semiconductors |
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HC705E5GRS/D Datasheet(HTML) 8 Page - NXP Semiconductors |
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8 / 148 page ![]() Table of Contents General Release Specification MC68HC705E5 — Rev. 1.0 Table of Contents Section 10. Computer Operating Properly (COP) Watchdog 10.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 10.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 10.3 System Control and Status Register. . . . . . . . . . . . . . . . . . . . .68 10.4 COP During Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 10.5 COP During Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Section 11. Motorola Bus (M Bus) Interface 11.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 11.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 11.3 M-Bus Interface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 11.4 M-Bus System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .73 11.5 M-Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73 11.5.1 Start Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74 11.5.2 Slave Address Transmission. . . . . . . . . . . . . . . . . . . . . . . .75 11.5.3 Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 11.5.4 Repeated Start Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76 11.5.5 Stop Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76 11.5.6 Arbitration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76 11.5.7 Clock Synchronization. . . . . . . . . . . . . . . . . . . . . . . . . . . . .77 11.5.8 Handshaking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77 11.6 M-Bus Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78 11.6.1 M-Bus Address Register . . . . . . . . . . . . . . . . . . . . . . . . . . .78 11.6.2 M-Bus Frequency Divider Register . . . . . . . . . . . . . . . . . . .80 11.6.3 M-Bus Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 11.6.4 M-Bus Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . .84 11.6.5 M-Bus Data I/O Register . . . . . . . . . . . . . . . . . . . . . . . . . . .86 11.7 M-Bus Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 11.8 Programming Considerations . . . . . . . . . . . . . . . . . . . . . . . . . .88 11.8.1 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88 11.8.2 Generation of a Start Signal and the First Byte of Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89 11.8.3 Software Responses after Transmission or Reception of a Byte . . . . . . . . . . . . . . . . . . . . . . . . . .90 11.8.4 Generation of the Stop Signal . . . . . . . . . . . . . . . . . . . . . . .91 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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