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参数资料
| 型号： | MB90522BPFV |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP120 |
| 封装： | PLASTIC, QFP-120 |
| 文件页数： | 66/99页 |
| 文件大小： | 978K |
| 代理商： | MB90522BPFV |
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MB90520A/520B Series
69
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB90522BPMC1 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90522PFF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90522PFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523A | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
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