參數(shù)資料
型號(hào)： MB90F523BPMC1
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP120
封裝： 14 X 14 MM, 1.70 MM HEIGHT, 0.40 MM PITCH, PLASTIC, LQFP-120
文件頁(yè)數(shù)： 59/96頁(yè)
文件大小： 2960K
代理商： MB90F523BPMC1
MB90520B Series
70
DS07-13707-5E
17. Communications Prescaler
Supplies the clock to the dedicated baud rate generator used by the UART (SCI) and extended I/O serial
interfaces.
By dividing the machine clock to produce the clock supply to the dedicated baud rate generator, the baud rate
can be specified independently of the machine clock speed.
The communications prescaler can divide the machine clock frequency
φ by the following seven ratios to
generate the clock supply to the dedicated baud rate generator and extended I/O serial interface :
φ/2, φ/3, φ/4, φ/5, φ/6, φ/7, φ/8
Communications prescaler functions
Note : As the same output from the communications prescaler is supplied to both the UART (SCI) and the extended
I/O serial interface, the transfer clock speed settings must be revised if the communications prescaler settings
are changed.
Block diagram
Function
Clock supply
Dedicated baud rate generator for the UART (SCI) and the extended I/O serial
interface. However, the same clock is supplied to both peripherals.
Divided clock frequency
φ/2, φ/3, φ/4, φ/5, φ/6, φ/7, φ/8 (φ : Machine clock frequency)
Interrupts
None
EI2OS support
Not supported by the extended intelligent I/O service (EI2OS) .
MD
DIV3 DIV2 DIV1 DIV0
φ/2
φ/3
φ/4
φ/5
φ/6
φ/7
φ/8
φ
SMCS:SMD2
SMD0 = 000B 100B
SMR:CS2
CS0 = 000B 100B
UART
CDCR
Extended serial I/O
Communications prescaler
: Undefined
φ
: Machine clock frequency
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB90F523BPMC1-GE1 制造商:FUJITSU 功能描述:
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