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參數(shù)資料
| 型號： | MB90523A |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 69/99頁 |
| 文件大?。?/td> | 978K |
| 代理商： | MB90523A |
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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.
φ
/2,
φ
/3,
φ
/4,
φ
/5,
φ
/6,
φ
/7,
φ
/8 (
φ
: Machine clock frequency)
None
Not supported by the extended intelligent I/O service (EI
2
OS) .
Divided clock frequency
Interrupts
EI
2
OS support
MD
DIV3 DIV2 DIV1
DIV0
φ
/2
φ
/3
φ
/4
φ
/5
φ
/6
φ
/7
φ
/8
φ
SMCS:SMD2
～
SMD0
=
000
B
～
100
B
SMR:CS2
～
CS0
=
000
B
～
100
B
UART
CDCR
Extended serial I/O
Communications prescaler
φ
: Undefined
: Machine clock frequency
相關PDF資料 |
PDF描述 |
|---|---|
| MB90523APFF | 16-bit Proprietary Microcontroller |
| MB90523APFV | 16-bit Proprietary Microcontroller |
| MB90523B | 16-bit Proprietary Microcontroller |
| MB90F523B | Octal Transparent D-type Latches With 3-State Outputs 20-CFP -55 to 125 |
| MB90F523BPFF | Octal Edge-Triggered D-type Flip-Flops With 3-State Outputs 20-LCCC -55 to 125 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB90523APFF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523PFF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90523PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
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