參數(shù)資料
型號(hào)： XR19L222IL64-0B-EB
廠商： Exar Corporation
文件頁(yè)數(shù)： 29/53頁(yè)
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR19L202 64QFN
標(biāo)準(zhǔn)包裝： 1
系列： *
XR19L222
35
REV. 1.0.1
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
MSR[6]: RI Input Status
Normally this bit is the complement of the RI# input. In the loopback mode this bit is equivalent to bit-2 in the
MCR register. The RI# input may be used as a general purpose input when the modem interface is not used.
MSR[7]: CD Input Status
Normally this bit is the complement of the CD# input. In the loopback mode this bit is equivalent to bit-3 in the
MCR register. The CD# input may be used as a general purpose input when the modem interface is not used.
4.10
Scratch Pad Register (SPR) - Read/Write
This is a 8-bit general purpose register for the user to store temporary data. The content of this register is
preserved during sleep mode but becomes 0xFF (default) after a reset or a power off-on cycle.
4.11
Enhanced Mode Select Register (EMSR)
This register replaces SPR (during a Write) and is accessible only when FCTR[6] = 1.
EMSR[1:0]: Receive/Transmit FIFO Level Count (Write-Only)
When Scratchpad Swap (FCTR[6]) is asserted, EMSR bits 1-0 controls what mode the FIFO Level Counter is
operating in.
During Alternate RX/TX FIFO Level Counter Mode, the first value read after EMSR bits 1-0 have been
asserted will always be the RX FIFO Level Counter. The second value read will correspond with the TX FIFO
Level Counter. The next value will be the RX FIFO Level Counter again, then the TX FIFO Level Counter and
so on and so forth.
EMSR[3:2]: Reserved
EMSR[5:4]: Extended RTS Hysteresis
TABLE 12: SCRATCHPAD SWAP SELECTION
FCTR[6] EMSR[1]
EMSR[0] Scratchpad is
0
X
Scratchpad
1
X
0
RX FIFO Level Counter Mode
1
0
1
TX FIFO Level Counter Mode
1
Alternate RX/TX FIFO Counter Mode
TABLE 13: AUTO RTS HYSTERESIS
EMSR
BIT-5
EMSR
BIT-4
FCTR
BIT-1
FCTR
BIT-0
RTS#
HYSTERESIS
(CHARACTERS)
0
1
0
1
0
1
0
±4
±6
±8
0
1
0
1
0
1
0
1
±8
±16
±24
±32
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參數(shù)描述
XR19L222IL64-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR19L400 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
XR19L400_09 制造商:EXAR 制造商全稱:EXAR 功能描述:SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
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XR19L400IL40-0B-EB 功能描述:界面開(kāi)發(fā)工具 Supports L400 40 pin QFN, PCI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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