参数资料
| 型号： | XR16L784CV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 9/51页 |
| 文件大小： | 0K |
| 描述： | IC UART 8B 3.3V QUAD 64LQFP |
| 标准包装： | 160 |
| 特点： | * |
| 通道数： | 4，QUART |
| FIFO's： | 64 字节 |
| 规程： | RS485 |
| 电源电压： | 2.97 V ~ 5.5 V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
| 其它名称： | 1016-1281 |
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XR16L784
17
REV. 1.2.3
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
2.15
Sleep Mode with Wake-Up Indicator
The 784 supports low voltage system designs, hence, a sleep mode is included to reduce its power
consumption when the chip is not actively used.
All of these conditions must be satisfied for the 784 to enter sleep mode:
■ no interrupts pending for all 8 channels of the 784 (ISR bit-0 = 1)
■ SLEEP register = 0x0F
■ modem inputs are not toggling (MSR bits 0-3 = 0)
■ RX input pin of all 4 channels are idling HIGH
The 784 stops its crystal oscillator to conserve power in the sleep mode. User can check the XTAL2 pin for no
clock output as an indication that the device has entered the sleep mode.
The 784 resumes normal operation by any of the following:
■ a receive data start bit transition (HIGH to LOW)
■ a data byte is loaded to the transmitter, THR or FIFO
■ a change of logic state on any of the modem or general purpose serial inputs: CTS#, DSR#, CD#, RI#
If the 784 is awakened by any one of the above conditions, it will return to the sleep mode automatically after
all interrupting conditions have been serviced and cleared. If the 784 is awakened by the modem inputs, a read
to the MSR is required to reset the modem inputs. In any case, the sleep mode will not be entered while an
interrupt is pending in any channel. Also, a special interrupt is generated with an indication of no pending
interrupt. Reading INT0 will clear this special interrupt. The 784 will stay in the sleep mode of operation until it
is disabled by setting SLEEP = 0x00.
A word of caution: owing to the starting up delay of the crystal oscillator after waking up from sleep mode, the
first few receive characters may be lost. The number of characters lost during the restart also depends on your
operating data rate. More characters are lost when operating at higher data rate.
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相关代理商/技术参数 |
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| XR16L784CVTR-F | 功能描述:UART 接口集成电路 3.3V QUAD UART 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 |
| XR16L784IV | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART |
| XR16L784IV-F | 功能描述:UART 接口集成电路 2.97V-5.5V 64B FIFO temp -45 to 85C 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 |
| XR16L784IVTR-F | 功能描述:UART 接口集成电路 PCI BUS QUAD UART 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 |
| XR16L788 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE OCTAL UART |
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