Asynchronous Serial Ports (UARTs)
Am186™CC/CH/CU Microcontrollers User’s Manual
13-23
13.5.12
Comparison to Other Devices
The UARTs are similar to those of the other Am186 family microcontrollers and are most
closely related to those of the Am186ES and Am186ED microcontrollers. However, the
functionality provided by the serial port modes of those devices have been replaced by
individual enables that allow for more flexibility on the UARTs and the configuration of the
DMA interface has been modified. In addition, both the UART and the High-Speed UART
of the microcontroller provide significant enhancements over previous UARTs, including
extended reads and writes, support for address bits on 7-data bit frames, and two stop bits.
The High-Speed UART’s enhancements additionally include autobaud detection, receive
and transmit FIFOs, and special character matching.
13.6
INITIALIZATION
On both external and internal reset, the following occurs:
■
All register bits are cleared to 0 except for the following second-level interrupt enable
bits in the (H)SPIMSK registers: BRK, RDR, THRE, FER, OER and PER. This provides
compatibility with the Am186ES and Am186ED microcontroller serial ports.
■
All UART and High-Speed UART signals, except for TXD_HU, default to that signal’s
PIO function. See Table 13-1 on page 13-3.
■
The ITF4 bit field in the SYSCON register is cleared, which defaults external interface
D to HDLC with flow control.
Содержание Am186 CC
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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...
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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...