參數(shù)資料
型號: ST16C554DCQ64TR-F
廠商: Exar Corporation
文件頁數(shù): 7/39頁
文件大小: 0K
描述: IC UART FIFO 16B QUAD 64LQFP
標(biāo)準(zhǔn)包裝: 1,000
特點(diǎn): *
通道數(shù): 4,QUART
FIFO's: 16 字節(jié)
規(guī)程: RS232
電源電壓: 2.97 V ~ 5.5 V
帶自動流量控制功能:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
包裝: 帶卷 (TR)
ST16C554/554D
15
REV. 4.0.1
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
3.0
UART INTERNAL REGISTERS
Each UART channel in the 554 has its own set of configuration registers selected by address lines A0, A1 and
A2 with a specific channel selected (See Table 1 and Table 2). The complete register set is shown on Table 7
TABLE 7: 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 - Divisor LSB
Read/Write
LCR[7] = 1
0
0 1
DLM - Divisor MSB
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
Read-only
1
1 0
MSR - Modem Status Register
Read-only
1
1 1
SPR - Scratch Pad Register
Read/Write
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