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參數(shù)資料
| 型號(hào)： | HD40A4668 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī)) |
| 中文描述： | 低電壓如同在微機(jī)芯片的DTMF產(chǎn)生電路（帶雙音多頻電路的低電壓微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 84/142頁(yè) |
| 文件大?。?/td> | 894K |
| 代理商： | HD40A4668 |
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HD404669 Series
84
Transmit Clock Error Detection (In External Clock Mode):
The serial interface will malfunction if a
spurious pulse caused by external noise conflicts with a normal transmit clock during transfer. A transmit
clock error of this type can be detected as shown in figure 61. If more than eight transmit clocks are input
in transfer state, at the eighth clock including a spurious pulse by noise, the octal counter reaches 000, the
serial 1 interrupt request flag (IFS1: $003, bit 2) is set, and transmit clock wait state is entered. At the
falling edge of the next normal clock signal, the transfer state is entered.
Meanwhile, in the interrupt handling routine, transfer end processing is performed, the serial 1 interrupt
request flag is reset, and a dummy write is performed to serial mode register 1A (SM1A: $005). The serial
interface then returns to the STS wait state, and the serial 1 interrupt request flag (IFS1: $003, 2) is set
again. It is therefore possible to detect a serial clock error by testing the serial 1 interrupt request flag after
the dummy write to serial mode register 1A.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD40A4669 | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī)) |
| HD404668 | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī)) |
| HD404669 | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī)) |
| HD407A4669 | Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī)) |
| HD404719FS | Five timer/counters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD40A4668H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40A4669 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40A4669H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40L4818H | 制造商:Renesas Electronics Corporation 功能描述: |
| HD40-M | 制造商:Tamura Corporation of America 功能描述: |
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