參數(shù)資料
型號(hào): ST16C1551CJ28
廠商: EXAR CORP
元件分類: Serial IO/Communication Controller
英文描述: 1 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC28
封裝: PLASTIC, LCC-28
文件頁數(shù): 6/38頁
文件大?。?/td> 622K
代理商: ST16C1551CJ28
ST16C1550/51
xr
2.97V TO 5.5V UART WITH 16-BYTE FIFO
REV. 4.2.1
14
3.0 UART INTERNAL REGISTERS
The 155X has a set of configuration registers selected by address lines A0, A1 and A2. The 16C550
compatible registers can be accessed when LCR[7] = 0 and the baud rate generator divisor registers can be
accessed when LCR[7] = 1. The complete register set is shown on Table 3 and Table 4.
TABLE 3: ST16C155X UART INTERNAL REGISTERS
A2,A1,A0 ADDRESSES
REGISTER
READ/WRITE
COMMENTS
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
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
LCR[7] = 0
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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