參數資料
| 型號： | XR16C864IQ-F |
| 廠商： | Exar Corporation |
| 文件頁數： | 9/51頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 128B QUAD 100QFP |
| 標準包裝： | 66 |
| 特點： | * |
| 通道數： | 4，QUART |
| FIFO's： | 128 字節(jié) |
| 規(guī)程： | RS232，RS485 |
| 電源電壓： | 2.97 V ~ 5.5 V |
| 帶自動流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調制解調器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-BQFP |
| 供應商設備封裝： | 100-QFP（14x20） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1277 |
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XR16C864
17
REV. 2.2.0
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
2.15
Auto RTS Hysteresis
The 864 has a new feature that provides flow control trigger hysteresis while maintaining compatibility with the
XR16C850, ST16C650A and ST16C550 family of UARTs. With the Auto RTS function enabled, an interrupt is
generated when the receive FIFO reaches the programmed RX trigger level. The RTS# pin will not be forced
to a logic 1 (RTS off), until the receive FIFO reaches the upper limit of the hysteresis level. The RTS# pin will
return to a logic 0 after the RX FIFO is unloaded to the lower limit of the hysteresis level. Under the above
described conditions, the 864 will continue to accept data until the receive FIFO gets full. The Auto RTS
function is initiated when the RTS# output pin is asserted to a logic 0 (RTS On). Table 15 shows the complete
details for the Auto RTS# Hysteresis levels. Please note that this table is for programmable trigger levels only
(Table D). The hysteresis values for Tables A-C are the next higher and next lower trigger levels in Tables A-C
(See Table 11).
2.16
Auto CTS Flow Control
Automatic CTS flow control is used to prevent data overrun to the remote receiver FIFO. The CTS# input is
monitored to suspend/restart the local transmitter. The auto CTS flow control feature is selected to fit specific
application requirement (see Figure 10):
Enable auto CTS flow control using EFR bit-7.
If using the Auto CTS interrupt:
Enable CTS interrupt through IER bit-7 (after setting EFR bit-4). The UART issues an interrupt when the
CTS# pin is de-asserted (logic 1): ISR bit-5 will be set to 1, and UART will suspend transmission as soon as
the stop bit of the character in process is shifted out. Transmission is resumed after the CTS# input is re-
asserted (logic 0), indicating more data may be sent.
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相關代理商/技術參數 |
參數描述 |
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| XR16C864IQTR-F | 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率: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 |
| XR16C872 | 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER |
| XR16C872CQ | 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER |
| XR16C872IQ | 制造商:EXAR 制造商全稱:EXAR 功能描述:DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER |
| XR16L2450 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART |
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