参数资料
| 型号： | XR68M752IM48-F |
| 厂商： | Exar Corporation |
| 文件页数： | 6/54页 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO 64B DUAL 48TQFP |
| 标准包装： | 250 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 64 字节 |
| 规程： | RS232，RS422，RS485 |
| 电源电压： | 1.62 V ~ 3.63 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 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TQFP |
| 供应商设备封装： | 48-TQFP（7x7） |
| 包装： | 托盘 |
| 其它名称： | 1016-1479 1016-1479-ND 1016-1642 XR68M752IM48-F-ND |
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XR16M752/XR68M752
14
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
REV. 1.1.1
When using 4X sampling mode, the bit time will have a jitter of ± 1/8 whenever DLD is non-zero, odd and not a
multiple of 4.
When using a non-standard data rate crystal or external clock, the divisor value can be calculated
with the following equation(s):
Required Divisor (decimal)=(XTAL1 clock frequency / prescaler) /(serial data rate x 16), with 16X mode, DLD[5:4]=’00’
Required Divisor (decimal)= (XTAL1 clock frequency / prescaler / (serial data rate x 8), with 8X mode, DLD[5:4] = ’01’
Required Divisor (decimal)= (XTAL1 clock frequency / prescaler / (serial data rate x 4), with 4X mode, DLD[5:4] = ’10’
ROUND( (Required Divisor - TRUNC(Required Divisor) )*16)/16 + TRUNC(Required Divisor), where
DLM = TRUNC(Required Divisor) >> 8
DLL = TRUNC(Required Divisor) & 0xFF
DLD = ROUND( (Required Divisor-TRUNC(Required Divisor) )*16)
The closest divisor that is obtainable in the M752 can be calculated using the following formula:
In the formulas above, please note that:
TRUNC (N) = Integer Part of N. For example, TRUNC (5.6) = 5.
ROUND (N) = N rounded towards the closest integer. For example, ROUND (7.3) = 7 and ROUND (9.9) = 10.
A >> B indicates right shifting the value ’A’ by ’B’ number of bits. For example, 0x78A3 >> 8 = 0x0078.
FIGURE 6. BAUD RATE GENERATOR
XTAL1
XTAL2
Crystal
Osc/
Buffer
MCR Bit-7=0
(default)
MCR Bit-7=1
DLL, DLM and DLD
Registers
Prescaler
Divide by 1
Prescaler
Divide by 4
16X or 8X or 4X
Sampling
Rate Clock
to Transmitter
and Receiver
To Other
Channel
Fractional Baud
Rate Generator
Logic
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR68M752IM48TR-F | 制造商:Exar Corporation 功能描述:XR68M752 Series 16 Mbps High Performance DUART With 64-Byte FIFO - TQFP-48 |
| XR7090AA-BC-0001 | 制造商:CREE 制造商全称:Cree, Inc 功能描述:XLamp㈢ XR LED Binning and Labeling |
| XR7090AA-BC-DD-EF-G-HHHH | 制造商:CREE 制造商全称:Cree, Inc 功能描述:XLamp㈢ XR LED Binning and Labeling |
| XR7090-AM-L1-0001 | 制造商:Cree 功能描述:LED AMBER XR 制造商:Cree 功能描述:LED, AMBER, XR 制造商:Cree 功能描述:LED, HIGH BRIGHTNESS, RED ORANGE, 67.2LM; Series:XLamp XR; LED Color:Amber; Luminous Flux @ Test:42lm; Wavelength Typ:595nm; Forward Current @ Test:350mA; Forward Current If Max:700mA; Forward Voltage @ Test:2.25V; Viewing Angle:100;RoHS Compliant: Yes |
| XR7090AM-L1-0001 | 制造商:Cree 功能描述:LED Uni-Color Amber 2-Pin SMD |
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