REV. 2.1.3 2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS 13 2.10.3 Transmitter Operation in FIFO Mode The host may fill the transmit" />
參數(shù)資料
型號: XR16C2850CM-F
廠商: Exar Corporation
文件頁數(shù): 5/51頁
文件大?。?/td> 0K
描述: IC UART FIFO 128B DUAL 48TQFP
標(biāo)準(zhǔn)包裝: 250
特點: *
通道數(shù): 2,DUART
FIFO's: 128 字節(jié)
規(guī)程: RS232,RS485
電源電壓: 2.97 V ~ 5.5 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
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: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 托盤
其它名稱: 1016-1274
xr
XR16C2850
REV. 2.1.3
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
13
2.10.3
Transmitter Operation in FIFO Mode
The host may fill the transmit FIFO with up to 128 bytes of transmit data. The THR empty flag (LSR bit-5) is set
whenever the FIFO is empty. The THR empty flag can generate a transmit empty interrupt (ISR bit-1) when the
amount of data in the FIFO falls below its programmed trigger level. The transmit empty interrupt is enabled by
IER bit-1. The TSR flag (LSR bit-6) is set when TSR/FIFO becomes empty.
FIGURE 7. TRANSMITTER OPERATION IN NON-FIFO MODE
FIGURE 8. TRANSMITTER OPERATION IN FIFO AND FLOW CONTROL MODE
Transmit
Holding
Register
(THR)
Transmit Shift Register (TSR)
Data
Byte
L
S
B
M
S
B
THR Interrupt (ISR bit-1)
Enabled by IER bit-1
TXNOFIFO1
16X or 8X
Clock
Transmit Data Shift Register
(TSR)
Transmit
Data Byte
THR Interrupt (ISR bit-1) falls
below the programmed Trigger
Level and then when becomes
empty. FIFO is Enabled by FCR
bit-0=1
Transmit
FIFO
16X or 8X
Clock
Auto CTS Flow Control (CTS# pin)
Auto Software Flow Control
Flow Control Characters
(Xoff1/2 and Xon1/2 Reg.
TXFIFO 1
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