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參數(shù)資料
| 型號(hào)： | XR16L788IQ-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 10/54頁 |
| 文件大小： | 0K |
| 描述： | IC UART 64B 3.3V OCTAL 100QFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 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： | 托盤 |
| 其它名稱： | 1016-1284 |
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XR16L788
18
HIGH PERFORMANCE 2.97V TO 5.5V OCTAL UART
REV. 1.2.3
2.15
Sleep Mode with Auto Wake-Up
The 788 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 788 to enter sleep mode:
■ no interrupts pending for all 8 channels of the 788 (ISR bit-0 = 1)
■ SLEEP register = 0xFF
■ modem inputs are not toggling (MSR bits 0-3 = 0)
■ RX input pin of all 8 channels are idling HIGH
The 788 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 788 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 788 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 788 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 788 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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| XR16L788IQTR-F | 功能描述:UART 接口集成電路 3.3V OCTAL UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)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 |
| XR16M2550 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO |
| XR16M2550IL-0B-EB | 功能描述:UART 接口集成電路 Supports M2550 32pin QFN, PCI Interface RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)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 |
| XR16M2550IL32 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| XR16M2550IL32-F | 功能描述:UART 接口集成電路 1.62V-3.63V 16B FIFO temp -45 to 85C RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)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 |
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