REV. 4.4.1 3.0 UART INTERNAL REGISTERS Each of the UART channel in the C2550 has its own set" />
參數(shù)資料
型號: ST16C2550CQ-0A-EB
廠商: Exar Corporation
文件頁數(shù): 8/37頁
文件大小: 0K
描述: EVAL BOARD FOR ST16C2550
標準包裝: 1
系列: *
ST16C2550
16
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
REV. 4.4.1
3.0 UART INTERNAL REGISTERS
Each of the UART channel in the C2550 has its own set of configuration registers selected by address lines
A0, A1 and A2 with CSA# or CSB# selecting the channel. The registers are 16C550 compatible. The complete
register set is shown on Table 6 and Table 7.
TABLE 6: UART CHANNEL A AND B UART INTERNAL REGISTERS
A2,A1,A0 ADDRESSES
REGISTER
READ/WRITE
COMMENTS
16C550 COMPATIBLE REGISTERS
0 0 0
RHR - Receive Holding Register
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0 0 0
DLL - Div Latch Low Byte
Read/Write
LCR[7] = 1
0 0 1
DLM - Div Latch High Byte
Read/Write
LCR[7] = 1
0 0 1
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0 1 0
ISR - Interrupt Status Register
FCR - FIFO Control Register
Read-only
Write-only
0 1 1
LCR - Line Control Register
Read/Write
1 0 0
MCR - Modem Control Register
Read/Write
1 0 1
LSR - Line Status Register
Reserved
Read-only
Write-only
1 1 0
MSR - Modem Status Register
Reserved
Read-only
Write-only
1 1 1
SPR - Scratch Pad Register
Read/Write
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