參數(shù)資料
型號(hào)： HD404324
廠商： Hitachi,Ltd.
英文描述： 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述： 4位HMCS400系列微電腦（4位單片微計(jì)算機(jī)）
文件頁(yè)數(shù)： 54/94頁(yè)
文件大?。?/td> 573K
代理商： HD404324
HD404328 Series
54
If port mode register A (PMRA) is written to in transmit clock wait state or transfer state, the serial mode
register (SMR) must be written to, to initialize the serial interface. The serial interface then enters STS
wait state.
If the serial interface shifts from transfer state to another state, the octal counter returns to 000, setting the
serial interrupt request flag.
STS instruction wait state
(octal counter = 000,
transmit clock disabled)
Transfer state
(octal counter 000)
Transmit clock wait state
(octal counter = 000)
STS instruction
SMR write
Transmit clock
8 transmit clocks (external clock)
STS instruction
(IFS
←
1)
8 transmit clocks
(internal clock)
(IFS
←
1)
SMR write (IFS
←
1)
Figure 32 Serial Interface Mode Transitions
Transmit Clock Error Detection:
The serial interface will malfunction if a spurious pulse caused by
external noise conflicts with a normal transmit clock during transmission. A transmit clock error of this
type can be detected as shown in figure 33.
If more than eight transmit clocks are input in transmit clock wait state, the serial interface’s state changes
to transfer, transmit clock wait, then back to transfer.
If the serial interface is set to STS wait state by writing data to the SMR after the serial interrupt request
flag has been reset, the flag is reset again.
相關(guān)PDF資料
PDF描述
HD404326 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
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HD404448 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404324FS 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD404324H 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD404324S 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD404324U 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD404324UFS 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
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