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参数资料
| 型号： | XR68M752IB-0A-EVB |
| 厂商： | Exar Corporation |
| 文件页数： | 21/54页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR 68M752 49BGA |
| 标准包装： | 1 |
| 系列： | * |
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XR16M752/XR68M752
28
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
REV. 1.1.1
IER[6]: RTS# Output Interrupt Enable (requires EFR bit-4=1)
Logic 0 = Disable the RTS# interrupt (default).
Logic 1 = Enable the RTS# interrupt. The UART issues an interrupt when the RTS# pin makes a transition
from low to high.
IER[7]: CTS# Input Interrupt Enable (requires EFR bit-4=1)
Logic 0 = Disable the CTS# interrupt (default).
Logic 1 = Enable the CTS# interrupt. The UART issues an interrupt when CTS# pin makes a transition from
low to high.
4.4
Interrupt Status Register (ISR) - Read-Only
The UART provides multiple levels of prioritized interrupts to minimize external software interaction. The
Interrupt Status Register (ISR) provides the user with six interrupt status bits. Performing a read cycle on the
ISR will give the user the current highest pending interrupt level to be serviced, others are queued up to be
serviced next. No other interrupts are acknowledged until the pending interrupt is serviced. The Interrupt
Source Table, Table 9, shows the data values (bit 0-5) for the interrupt priority levels and the interrupt sources
associated with each of these interrupt levels.
4.4.1
Interrupt Generation:
LSR is by any of the LSR bits 1, 2, 3, 4 and 7.
RXRDY is by RX trigger level.
RXRDY Time-out is by a 4-char plus 12 bits delay timer.
TXRDY is by TX trigger level or TX FIFO empty (or transmitter empty in auto RS-485 control).
MSR is by any of the MSR bits 0, 1, 2 and 3.
Receive Xoff/Special character is by detection of a Xoff or Special character.
CTS# is when its transmitter toggles the input pin (from LOW to HIGH) during auto CTS flow control.
RTS# is when its receiver toggles the output pin (from LOW to HIGH) during auto RTS flow control.
4.4.2
Interrupt Clearing:
LSR interrupt is cleared by reading all characters with errors out of the RX FIFO.
RXRDY interrupt is cleared by reading data until FIFO falls below the trigger level.
RXRDY Time-out interrupt is cleared by reading RHR.
TXRDY interrupt is cleared by a read to the ISR register or writing to THR.
MSR interrupt is cleared by a read to the MSR register.
Xoff interrupt is cleared when Xon character(s) is received.
Special character interrupt is cleared by a read to ISR.
RTS# and CTS# flow control interrupts are cleared by a read to the MSR register.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR68M752IB-0B-EVB | 功能描述:界面开发工具 Eval Board for XR68M752IB Series RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR68M752IB49 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
| XR68M752IB49-F | 功能描述:UART 接口集成电路 W/64 BYTE FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR68M752IL-0B-EB | 功能描述:界面开发工具 Support XR68M752 32L QFN, PCI Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR68M752IL32 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
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