参数资料
| 型号： | ST16C650AIJ44-F |
| 厂商： | Exar Corporation |
| 文件页数： | 13/50页 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO 32B 44PLCC |
| 标准包装： | 27 |
| 特点： | * |
| 通道数： | 1，UART |
| FIFO's： | 32 字节 |
| 规程： | 打印机，RS232，RS422，RS485 |
| 电源电压： | 2.9 V ~ 5.5 V |
| 带并行端口： | 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 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 管件 |
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ST16C650A
20
2.90V TO 5.5V UART WITH 32-BYTE FIFO
REV. 5.0.3
2.17
Sleep Mode & Wake-up Indicator
The 650A is designed to operate with low power consumption. A special sleep mode is included to further
reduce power consumption when the chip is not being used. All of these conditions must be satisfied for the
650A to enter sleep mode:
■ no interrupts pending 650A (ISR bit-0 = 1)
■ sleep mode is enabled (IER bit-4 = 1)
■ modem inputs are not toggling (MSR bits 0-3 = 0)
■ RX input pin is idling at a logic 1
The 650A 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 650A resumes normal operation by any of the following:
■ a receive data start bit transition (logic 1 to 0)
■ 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 sleep mode is enabled and the 650A is awakened by one of the conditions described above, an interrupt
is issued by the 650A to signal to the CPU that it is awake. The lower nibble of the interrupt source register
(ISR) will read a value of 0x1 for this interrupt and reading the ISR clears this interrupt. Since the same value
(0x1) is also used to indicate no pending interrupt, users should exercise caution while using the sleep mode.
Once awakened, the 650A will return to the sleep mode automatically after any other interrupting condition (the
true cause of waking up the 650A) has been serviced. If the 650A 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. The 650A will stay in the sleep mode of operation until it is disabled by setting IER bit-4 to
a logic 0.
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相关代理商/技术参数 |
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|---|---|
| ST16C650AIP40 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.90V TO 5.5V UART WITH 32-BYTE FIFO |
| ST16C650AIQ48 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:UART, 48 Pin, Plastic, TQFP |
| ST16C650AIQ48-F | 功能描述:UART 接口集成电路 UART W/32BYTEFIFO 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 |
| ST16C650AIQ48TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| ST16C650AIQ48TR-F | 功能描述:UART 接口集成电路 UART W/32BYTEFIFO 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 |
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