參數(shù)資料
型號(hào): TUSB3410VF
英文描述: BUS CONTROLLER
中文描述: 總線控制器
文件頁(yè)數(shù): 47/92頁(yè)
文件大?。?/td> 317K
代理商: TUSB3410VF
7
1
7 UART
7.1
UART Registers
Table 7
1 summarizes the UART registers. These registers are used for data I/O, control, and status information.
UART setup is done by the MCU. Data transfer is typically performed by the DMAC. However, the MCU can perform
data transfer without DMA; this is useful when debugging the firmware.
Table 7
1. UART Registers Summary
REGISTER NAME
ACCESS
FUNCTION
COMMENTS
RDR
R/O
UART receiver data register
Can be accessed by MCU or DMA
TDR
W/O
UART transmitter data register
Can be accessed by MCU or DMA
LCR
R/W
UART line control register
FCRL
R/W
UART flow control register
MCR
R/W
UART modem control register
LSR
R/O
UART line status register
Can generate an interrupt
MSR
R/O
UART modem status register
Can generate an interrupt
DLL
R/W
UART divisor register (low byte)
DLH
R/W
UART divisor register (high byte)
XON
R/W
UART Xon register
XOFF
R/W
UART Xoff register
MASK
R/W
UART interrupt mask register
Can control three interrupt sources
7.1.1
RDR: Receiver Data Register (Addr:FFA0)
The receiver data register consists of a 32-byte FIFO. Data received from the SIN pin are converted from
serial-to-parallel format and stored in this FIFO. Data transfer from this register to the RAM buffer is the responsibility
of the DMA controller.
7
6
5
4
3
2
1
0
D7
R/O
D6
R/O
D5
R/O
D4
R/O
D3
R/O
D2
R/O
D1
R/O
D0
R/O
BIT
7
0
NAME
D[7:0]
RESET
0
FUNCTION
Receiver byte
7.1.2
TDR: Transmitter Data Register (Addr:FFA1)
The transmitter data register is double buffered. Data written to this register is loaded into the shift register, and shifted
out on SOUT. Data transfer from the RAM buffer to this register is the responsibility of the DMA controller.
7
6
5
4
3
2
1
0
D7
W/O
D6
W/O
D5
W/O
D4
W/O
D3
W/O
D2
W/O
D1
W/O
D0
W/O
BIT
7
0
NAME
D[7:0]
RESET
0
FUNCTION
Transmit byte
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