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型號(hào)：	HD6433045
廠商：	Hitachi,Ltd.
英文描述：	Multipole Connector; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No RoHS Compliant: No
中文描述：	日立單片機(jī)
文件頁(yè)數(shù)：	493/867頁(yè)
文件大小：	2771K
代理商：	HD6433045

13.3.4 Synchronous Operation

In synchronous mode, the SCI transmits and receives data in synchronization with clock pulses.

This mode is suitable for high-speed serial communication.

The SCI transmitter and receiver share the same clock but are otherwise independent, so full

duplex communication is possible. The transmitter and receiver are also double buffered, so

continuous transmitting or receiving is possible by reading or writing data while transmitting or

receiving is in progress.

Figure 13-14 shows the general format in synchronous serial communication.

Figure 13-14 Data Format in Synchronous Communication

In synchronous serial communication, each data bit is placed on the communication line from one

falling edge of the serial clock to the next. Data is guaranteed valid at the rise of the serial clock.

In each character, the serial data bits are transmitted in order from LSB (first) to MSB (last). After

output of the MSB, the communication line remains in the state of the MSB. In synchronous mode

the SCI receives data by synchronizing with the rise of the serial clock.

Communication Format:

The data length is fixed at 8 bits. No parity bit or multiprocessor bit

can be added.

An internal clock generated by the on-chip baud rate generator or an external clock input

from the SCK pin can be selected by clearing or setting the CKE1 bit in SCR. See table 13-9.

When the SCI operates on an internal clock, it outputs the clock signal at the SCK pin. Eight clock

pulses are output per transmitted or received character.

When the SCI operates on an internal clock, the serial clock outputs the clock signal at the SCK

pin. Eight clock pulses are output per transmitted or received character. When the SCI is not

transmitting or receiving, the clock signal remains in the high state. However, when receiving

only, overrun error may occur or the serial clock continues output until the RE bit clears at 0.

When transmitting or receiving in single characters, select the external clock.

Serial clock

One unit (character or frame) of serial data

Transfer direction

Note: High except in continuous transmitting or receiving

相關(guān)PDF資料	PDF描述
HD6433047	CONN HEADER .100 SNGL STR 36POS
HD6433048	Hitachi Single-Chip Microcomputer
HD64F3642A	H8/3644 Series Hardware Manual
HD6473644	H8/3644 Series Hardware Manual
HD64F3643	H8/3644 Series Hardware Manual

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
HD6433045F	制造商:未知廠家制造商全稱:未知廠家功能描述:32-Bit Microcontroller
HD6433045TF	制造商:未知廠家制造商全稱:未知廠家功能描述:32-Bit Microcontroller
HD6433045VF	制造商:未知廠家制造商全稱:未知廠家功能描述:32-Bit Microcontroller
HD6433045VTF	制造商:未知廠家制造商全稱:未知廠家功能描述:32-Bit Microcontroller
HD6433047	制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Hitachi Single-Chip Microcomputer

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