参数资料
| 型号： | XR17C158IV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 11/67页 |
| 文件大小： | 0K |
| 描述： | IC UART PCI BUS OCTAL 144LQFP |
| 标准包装： | 60 |
| 特点： | * |
| 通道数： | 8 |
| FIFO's： | 64 字节 |
| 规程： | RS485 |
| 电源电压： | 4.5 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： | 144-LQFP |
| 供应商设备封装： | 144-LQFP（20x20） |
| 包装： | 托盘 |
| 其它名称： | 1016-1646 XR17C158IV-F-ND |
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xr
XR17C158
REV. 1.4.3
5V PCI BUS OCTAL UART
19
1.2.6 SLEEP [31:24] - (default 0x00)
The 8-bit Sleep register enables each UART separately to enter Sleep mode. Sleep mode reduces power
consumption when the system needs to put the UART(s) to idle. All of these conditions must be satisfied for
the 158 to enter sleep mode:
no interrupts pending (INT0 = 0x00)
divisor is a non-zero value for all channels (ie. DLL = 0x1)
sleep mode is enabled for all 8 channels (SLEEP = 0xFF)
modem inputs for all channels are not toggling (MSR bits 0-3 = 0)
RX input pins for all channels are idling HIGH
The 158 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 158 resumes normal operation by any of the following:
a receive data start bit transition (HIGH to LOW) on the RX input of any channel
a data byte is loaded to the transmitter, THR or FIFO, of any channel
a change of logic state on any of the modem or general purpose serial inputs of any channel: CTS#, DSR#,
CD#, RI#
If the 158 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 158 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 in-
terrupt is pending from any channel. The 158 will stay in the sleep mode of operation until it is disabled by set-
ting Sleep = 0x00. The UART is ready after 32 crystal clocks to ensure full functionality. Also, a special interrupt
is generated with an indication of no pending interrupt. Reading INT0 will clear this special interrupt. Logic 0
(default) disables the sleep mode and logic 1 enables the sleep mode for each channel. The crystal oscillator
shuts down only when all 8 channels are in sleep mode.
1.2.7
Device Identification and Revision
There are two internal registers that provide device identification and revision, DVID and DREV registers. The
8-bit content in the DVID register provides device identification. A return value of 0x28 from this register
indicates the device is a XR17C158. The DREV register returns an 8-bit value of 0x01 for revision A with 0x02
equals to revision B and so forth. This information is very useful to the software driver for identifying which
device it is communicating with and to keep up with revision changes.
DVID [15:8]
Device identification for the type of UART. The upper nibble indicates it is an XR17Cxxx series with lower
nibble indicating the number of channels.
Examples:
XR17C158 or XR17D158 = 0x28
XR17C154 or XR17D154 = 0x24
XR17C152 or XR17D152 = 0x22
DREV [7:0]
Revision number of the XR17C158. A 0x01 represents "revision-A" with 0x02 for rev-B and so forth.
SLEEP Register
Individual UART Channel Sleep Enable
Ch-6
Ch-7
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
相关PDF资料 |
PDF描述 |
|---|---|
| XR17D152CM-F | IC UART PCI BUS DUAL 100TQFP |
| XR17D154CV-F | IC UART PCI BUS QUAD 144LQFP |
| XR17D158IV-F | IC UART PCI BUS OCTAL 144LQFP |
| XR17V252IM | IC UART PCI BUS DUAL 100TQFP |
| XR17V254IV-F | IC UART PCI BUS QUAD 144LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XR17C158IVTR-F | 制造商:Exar Corporation 功能描述:UART 8-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C158IVTR-F |
| XR17D152 | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152CM | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152CM-0A-EVB | 功能描述:界面开发工具 Supports D152 100 ld TQFP, PCI Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR17D152CM-F | 功能描述:UART 接口集成电路 3.3V-5V 64B FIFO temp 0C to 70C; 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 |
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