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参数资料
| 型号： | XR16V2651IM-0B-EB |
| 厂商： | Exar Corporation |
| 文件页数： | 4/51页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR V2651 48TQFP |
| 标准包装： | 1 |
| 系列： | * |
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XR16V2651
12
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
REV. 1.0.2
(+/- 1/16) whenever the DLD is non-zero and is an odd number. When using a non-standard data rate crystal or
external clock, the divisor value can be calculated with the following equation(s):
The closest divisor that is obtainable in the V2651 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.
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)
FIGURE 5. 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 |
|---|---|
| XR16V2651IM-F | 功能描述:UART 接口集成电路 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 |
| XR16V2651IMTR-F | 制造商:Exar Corporation 功能描述:UART 2-CH 32Byte FIFO 2.5V/3.3V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16V2651IMTR-F |
| XR16V2652 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 32-BYTE FIFO |
| XR16V2652_07 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 32-BYTE FIFO |
| XR16V2652IJ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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