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參數(shù)資料
| 型號(hào)： | XR17V258IV-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 52/69頁(yè) |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR17V258 144LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
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XR17V258
56
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.2
EFR[6]: Auto RTS or DTR Flow Control Enable
RTS#/DTR# output may be used for hardware flow control by setting EFR bit [6] to logic 1. When Auto RTS/
DTR is selected, an interrupt will be generated when the receive FIFO is filled to the programmed trigger level
and RTS/DTR# will de-assert (HIGH) at the next upper trigger or selected hysteresis level. RTS/DTR# will re-
assert (LOW) when FIFO data falls below the next lower trigger or selected hysteresis level (see FCTR bits 4-
7). The RTS# or DTR# output must be asserted (LOW) before the auto RTS/DTR can take effect. The selection
for RTS# or DTR# is through MCR bit [2]. RTS/DTR# pin will function as a general purpose output when
hardware flow control is disabled.
Logic 0 = Automatic RTS/DTR flow control is disabled (default).
Logic 1 = Enable Automatic RTS/DTR flow control.
EFR[5]: Special Character Detect Enable
Logic 0 = Special Character Detect Disabled (default).
Logic 1 = Special Character Detect Enabled. The UART compares each incoming receive character with
data in Xoff-2 register. If a match exists, the received data will be transferred to FIFO and ISR bit [4] will be
set to indicate detection of the special character. bit [0] corresponds with the LSB bit for the receive
character. If flow control is set for comparing Xon1, Xoff1 (EFR [1:0]=10) then flow control and special
character work normally. However, if flow control is set for comparing Xon2, Xoff2 (EFR[1:0]=01) then flow
control works normally, but Xoff2 will not go to the FIFO, and will generate an Xoff interrupt and a special
character interrupt.
EFR[4]: Enhanced Function Bits Enable
Enhanced function control bit. This bit enables the enhanced functions in IER bits [7:5], ISR bits [5:4], FCR
bits [5:4], MCR bits [7:5,3:2] and MSR [7:2] bits to be modified. After modifying any enhanced bits, EFR bit [4]
can be set to a logic 0 to latch the new values. This feature prevents legacy software from altering or
overwriting the enhanced functions once set. Normally, it is recommended to leave it enabled.
Logic 0 = Disable write access to the enhanced function bits: IER bits [7:5], ISR bits [5:4], FCR bits [5:4],
MCR bits [7:5, 3:2] and MSR [7:2] bits. After a reset, all these bits are set to a logic 0 to be compatible with
ST16C550 mode (default).
Logic 1 = Enables write access to the enhanced function bits: IER bits [7:5], ISR bits [5:4], FCR bits [5:4],
MCR bits [7:5, 3:2] and MSR [7:2] bits.
EFR[3:0]: Software Flow Control Select
Combinations of software flow control can be selected by programming these bits, as shown in Table 21
below.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR17V258IVF | 制造商:Exar Corporation 功能描述: |
| XR17V258IV-F | 功能描述:UART 接口集成電路 66MHz Octal PCI 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 |
| XR17V258IVTR-F | 功能描述:UART 接口集成電路 66MHz Octal PCI 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 |
| XR17V352 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUAL PCI EXPRESS UART |
| XR17V352IB-0A-EVB | 功能描述:界面開(kāi)發(fā)工具 Eval Board for XR17V352IB Series 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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