參數(shù)資料
型號(hào)： MB90F457
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)： 48/78頁
文件大小： 680K
代理商： MB90F457
MB90455 Series
48
11. UART Outline
UART is a general-purpose serial data communication interface for synchronous and asynchronous communi-
cation using external devices.
Provided with bi-directional communication function for both clock-synchronous and clock-asynchronous
modes.
Provided with master/slave communication function (multi-processor mode). (Only master side is available.)
Interrupt request is generated upon completion of reception, completion of transmission and detection of
reception error.
Ready for expanded intelligent service, EI
2
OS.
UART functions
Note : Start/stop bit is not added upon clock-synchronous transmission. Data only is transmitted.
UART operation modes
: Disallowed
*1 : “+1” is an address/data selection bit used for communication control (bit 11 of SCR1 register: A/D)
*2 : Only 1 bit is detected as a stop bit on data reception.
Description
Data buffer
Full-duplex double buffer
Transmission mode
Clock synchronous (No start/stop bit, no parity bit)
Clock asynchronous (start-stop synchronous)
Baud rate
Built-in special-purpose baud-rate generator. Setting is selectable
among 8 values.
Input of external values is allowed.
Use of clock from external timer (16-bit reload timer 0) is allowed.
Data length
7 bits (only asynchronous normal mode)
8 bits
Signaling system
Non Return to Zero (NRZ) system
Reception error detection
Framing error
Overrun error
Parity error (not detectable in operation mode 1 (multi-processor
mode))
Interrupt request
Receive interrupt (reception completed, reception error detected)
Transmission interrupt (transmission completed)
Ready for expanded intelligent I/O service (EI
2
OS) in both transmis-
sion and reception
Master/slave communication function
(asynchronous, multi-processor mode)
Communication between 1 (master) and n (slaves) are available
(usable as master only).
Operation mode
Data length
Synchronization
Stop bit length
With parity
Without parity
0
Asynchronous mode
(normal mode)
7-bit or 8-bit
Asynchronous
1- bit or 2-bit *
2
1
Multi processor mode
8+1
*1
Asynchronous
2
Synchronous mode
8
Synchronous
No
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