參數(shù)資料
型號(hào)： XR16L788CQTR-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 24/54頁(yè)
文件大?。?/td> 0K
描述： IC UART FIFO 64B OCTAL 100QFP
標(biāo)準(zhǔn)包裝： 500
特點(diǎn)： *
通道數(shù)： 8
FIFO's： 64 字節(jié)
規(guī)程： RS485
電源電壓： 2.97 V ~ 5.5 V
帶自動(dòng)流量控制功能： 是
帶IrDA 編碼器/解碼器： 是
帶故障啟動(dòng)位檢測(cè)功能： 是
帶調(diào)制解調(diào)器控制功能： 是
安裝類型： 表面貼裝
封裝/外殼： 100-BQFP
供應(yīng)商設(shè)備封裝： 100-QFP（14x20）
包裝： 帶卷 (TR)
XR16L788
30
HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART
REV. 1.2.3
IER[0]: RHR Interrupt Enable
The receive data ready interrupt will be issued when RHR has a data character in the non-FIFO mode or when
the receive FIFO has reached the programmed trigger level in the FIFO mode.
Logic 0 = Disable the receive data ready interrupt (default).
Logic 1 = Enable the receiver data ready interrupt.
IER[1]: THR Interrupt Enable
This interrupt is associated with bit-5 in the LSR register. An interrupt is issued whenever the THR becomes
empty or when data in the TX FIFO falls below the programmed trigger level.
Logic 0 = Disable Transmit Holding Register empty interrupt (default).
Logic 1 = Enable Transmit Holding Register empty interrupt.
IER[2]: Receive Line Status Interrupt Enable
If any of the LSR register bits 1, 2, 3 or 4 is a logic 1, it will generate an interrupt to inform the host controller
about the error status of the current data byte in FIFO. LSR bits 1-4 generate an interrupt immediately when
the character has been received.
Logic 0 = Disable the receiver line status interrupt (default).
Logic 1 = Enable the receiver line status interrupt.
IER[3]: Modem Status Interrupt Enable
Logic 0 = Disable the modem status register interrupt (default).
Logic 1 = Enable the modem status register interrupt.
IER[4]: Reserved.
IER[5]: Xoff Interrupt Enable (requires EFR bit-4=1)
Logic 0 = Disable the software flow control, receive Xoff interrupt (default).
Logic 1 = Enable the software flow control, receive Xoff interrupt. See Software Flow Control section for
details.
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.
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.
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 queue up for next
service. No other interrupts are acknowledged until the pending interrupt is serviced. The Interrupt Source
Table, Table 13, shows the data values (bit 0-5) for the six prioritized interrupt levels and the interrupt sources
associated with each of these interrupt levels.
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