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參數(shù)資料
| 型號： | XR16V798IQ-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 35/56頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR16V798-A 100QFP |
| 設(shè)計資源： | XR17V798/794 Eval Board Schematic |
| 標準包裝： | 1 |
| 系列： | * |
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XR16V798
40
HIGH PERFORMANCE 2.25V TO 3.6V OCTAL UART WITH FRACTIONAL BAUD RATE
REV. 1.0.1
MSR [3]: Transmitter Disable
This bit can be used to disable the transmitter by halting the Transmit Shift Register (TSR). When this bit is set
to a ’1’, the bytes already in the FIFO will not be sent out. Also, any more data loaded into the FIFO will stay in
the FIFO and will not be sent out. When this bit is set to a ’0’, the bytes currently in the TX FIFO will be sent
out. Please note that setting this bit to a ’1’ stops any character from going out. Also, this bit must be a ’0’ for
Send Char Immediate function (see MCR[3]).
Logic 0 = Enable Transmitter (default).
Logic 1 = Disable Transmitter.
MSR [2]: Receiver Disable
This bit can be used to disable the receiver by halting the Receive Shift Register (RSR). When this bit is set to
a logic 1, the receiver will operate in one of the following ways:
■ If a character is being received at the time of setting this bit, that character will be correctly received. No
more characters will be received.
■ If the receiver is idle at the time of setting this bit, one character will still be received fully. No more
characters will be received.
The receiver can be enabled and will start receiving characters by resetting this bit to a logic 0. The receiver
will operate in one of the following ways:
■ If the receiver is idle (RX pin is HIGH) at the time of setting this bit, the next character will be received
normally. It is recommended that the receiver be idle when resetting this bit to a logic 0.
■ If the receiver is not idle (RX pin is toggling) at the time of setting this bit, the RX FIFO will be filled with
unknown data.
Any data that is in the RX FIFO can be read out at any time whether the receiver is disabled or not.
Logic 0 = Enable Receiver (default).
Logic 1 = Disable Receiver.
MSR [1:0]: Reserved
4.11
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.
4.12
FEATURE CONTROL REGISTER (FCTR) - Read/Write
This register controls the UART enhanced functions that are not available on ST16C554 or ST16C654.
FCTR[7:6]: TX and RX FIFO Trigger Table Select
These 2 bits select the transmit and receive FIFO trigger level table A, B, C or D. When table A, B, or C is
selected the auto RTS flow control trigger level is set to "next FIFO trigger level" for compatibility to ST16C550
and ST16C650 series. RTS/DTR# triggers on the next level of the RX FIFO trigger level, in another word, one
FIFO level above and one FIFO level below. See in Table 14 for complete selection with FCR bit 4-5 and
FCTR bit 6-7, i.e. if Table C is used on the receiver with RX FIFO trigger level set to 56 bytes, RTS/DTR#
output will de-assert at 60 and re-assert at 16.
FCTR[5]: Auto RS485 Enable
Auto RS485 half duplex control enable/disable.
Logic 0 = Standard ST16C550 mode. Transmitter generates an interrupt when transmit holding register
(THR) becomes empty. Transmit Shift Register (TSR) may still be shifting data bit out.
Logic 1 = Enable Auto RS485 half duplex direction control. RTS# output changes its logic level from HIGH to
LOW when finished sending the last stop bit of the last character out of the TSR register. It changes from
LOW to HIGH when a data byte is loaded into the THR or transmit FIFO. The change to HIGH occurs prior
sending the start-bit. It also changes the transmitter interrupt from transmit holding to transmit shift register
(TSR) empty.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16V798IQ-0B-EVB | 功能描述:UART 接口集成電路 Supports V798 100 ld QFP,PCI Interface 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 |
| XR16V798IQ-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 |
| XR16V798IQTR-F | 制造商:Exar Corporation 功能描述:UART 8-CH 64Byte FIFO 2.5V/3.3V 100-Pin PQFP T/R |
| XR-1790 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Schematic |
| XR17C152 | 制造商:EXAR 制造商全稱:EXAR 功能描述:5V PCI BUS DUAL UART |
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