參數(shù)資料
型號: ST16C1550
廠商: Exar Corporation
英文描述: 2.97V TO 5.5V UART WITH 16-BYTE FIFO
中文描述: 2.97V至5.5V的UART具有16字節(jié)FIFO
文件頁數(shù): 14/37頁
文件大?。?/td> 428K
代理商: ST16C1550
ST16C1550/51
2.97V TO 5.5V UART WITH 16-BYTE FIFO
á
REV. 4.2.0
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
.
T
ABLE
3: ST16C155X UART INTERNAL REGISTERS
A2,A1,A0 A
DDRESSES
R
EGISTER
R
EAD
/W
RITE
C
OMMENTS
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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