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MC68HC908AP16CFB Datasheet(PDF) 17 Page - Motorola, Inc |
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MC68HC908AP16CFB Datasheet(HTML) 17 Page - Motorola, Inc |
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17 / 440 page ![]() Table of Contents MC68HC908AP Family — Rev. 2.5 Data Sheet MOTOROLA 17 Section 16. Multi-Master IIC Interface (MMIIC) 16.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 16.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 16.3 I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 16.4 Multi-Master IIC System Configuration . . . . . . . . . . . . . . . . . . 322 16.5 Multi-Master IIC Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . 322 16.5.1 START Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 16.5.2 Slave Address Transmission . . . . . . . . . . . . . . . . . . . . . . . 323 16.5.3 Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 16.5.4 Repeated START Signal . . . . . . . . . . . . . . . . . . . . . . . . . . 324 16.5.5 STOP Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 16.5.6 Arbitration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 16.5.7 Clock Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 16.5.8 Handshaking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 16.5.9 Packet Error Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326 16.6 MMIIC I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326 16.6.1 MMIIC Address Register (MMADR) . . . . . . . . . . . . . . . . . . 326 16.6.2 MMIIC Control Register 1 (MMCR1) . . . . . . . . . . . . . . . . . 328 16.6.3 MMIIC Control Register 2 (MMCR2) . . . . . . . . . . . . . . . . . 330 16.6.4 MMIIC Status Register (MMSR). . . . . . . . . . . . . . . . . . . . . 332 16.6.5 MMIIC Data Transmit Register (MMDTR) . . . . . . . . . . . . . 334 16.6.6 MMIIC Data Receive Register (MMDRR). . . . . . . . . . . . . . 335 16.6.7 MMIIC CRC Data Register (MMCRCDR). . . . . . . . . . . . . . 336 16.6.8 MMIIC Frequency Divider Register (MMFDR) . . . . . . . . . . 337 16.7 Program Algorithm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338 16.7.1 Data Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 16.8 SMBus Protocols with PEC and without PEC. . . . . . . . . . . . . 340 16.8.1 Quick Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340 16.8.2 Send Byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340 16.8.3 Receive Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340 16.8.4 Write Byte/Word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341 16.8.5 Read Byte/Word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341 16.8.6 Process Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 16.8.7 Block Read/Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 16.9 SMBus Protocol Implementation . . . . . . . . . . . . . . . . . . . . . . 343 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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