Am186™CC/CH/CU Microcontrollers User’s Manual
14-1
CHAPTER
14
SYNCHRONOUS
SERIAL PORT (SSI)
14.1
OVERVIEW
The Am186CC/CH/CU microcontrollers each include one synchronous serial port, which
uses the SSI to provide a half-duplex, bidirectional communications interface between the
microcontroller and other system components (i.e., integrated circuits). This interface is
typically used by the microcontroller to monitor the status of other system devices or to
configure these devices under software control. In a communications application, these
devices could be system components such as transceivers or audio coder-decoders
(codecs). The SSI supports data transfer speeds of up to 25 Mbit/s.
The SSI provides the following features:
■
Three I/O signals: SCLK, SDATA, and SDEN, multiplexed with PIOs
■
Programmable data order: Normal (least-significant bit first) or Reverse (most-
significant-bit first)
■
Programmable SSI clock divisor: Divides the CPU clock from 2 to 256 in power of 2
increments
■
Programmable polarity of the SCLK and SDEN signals
■
Bidirectional transmit/receive shift register
14.2
BLOCK DIAGRAM
Figure 14-1 shows the block diagram for the SSI.
Содержание Am186 CC
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Страница 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Страница 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Страница 39: ...Architectural Overview Am186 CC CH CU Microcontrollers User s Manual 1 15 Figure 1 6 32 Channel Linecard CH CC...
Страница 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Страница 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Страница 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Страница 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Страница 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...