Asynchronous Serial Ports (UARTs)
13-2
Am186™CC/CH/CU Microcontrollers User’s Manual
– Receive overflow error detected
– Parity error detected
– Transmitter empty
– Receive line idle
The High-Speed UART interface has been designed so that code written to run on the
UART runs on the High-Speed UART with no modification other than adjusting the register
offsets. The High-Speed UART interface maintains all bits and bit positions in the UART
interface. The High-Speed Serial Port Status (HSPTAT) register contains additional status
bits, but these bits read as zeros unless the associated function is enabled. Code written
for the UART that writes zeros to reserved bits should run identically on the High-Speed
UART.
13.2
BLOCK DIAGRAM
Figure 13-1 shows the UART and High-Speed UART block diagram. Features specific to
the High-Speed UART are marked “High-Speed UART Only”. UART signal names begin
with “SP”; High-Speed UART signal names begin with “HSP”. Signals for both start with
“(H)SP.”
Figure 13-1
UARTs Block Diagram
Character
Match
(High-
Speed
UART Only)
Write DATA15–DATA0
Read DATA15–DATA0
BLOCK_SELECT
AD4–AD1
WR
RD
(H)SP_TXDRQ
(H)SP_RXDRQ
Interrupt Request
Pad Signals
CO_TXD_(H)U
CI_CTS_(H)U_L
CI_UCLK
External Clock
CI_RXD_(H)U
CO_RTR_(H)U_L
Baud Clock
Derived
RX Clock
Receiver
TX Clock Enable
Interrupt
Transmit CONTROL
Transmit DATA
Transmit STATUS
BAUD CONTROL
BAUD DIVISOR
Autobaud Registers
(High-Speed UART Only)
New Baud Value
(High-Speed UART Only)
Receive CONTROL
Receive DATA
Receive STATUS
Char Match Regs
(High-Speed UART Only)
Status Register
Interrupt Mask Register
Configuration Bits
(H)SP_REG
HSP_TXFIFO
(High-Speed
UART Only)
HSP_RXFIFO
(High-Speed
UART Only)
Autobaud
(High-
Speed
UART Only)
Transmitter
Generator
Request
Transmit
Data
Clear-To-
Send
Receive
Data
Ready-
To-
Receive
Generator
Содержание Am186 CC
Страница 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Страница 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
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...