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參數(shù)資料

型號(hào)：	HD404054
廠商：	Hitachi,Ltd.
英文描述：	4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
中文描述：	4位單片機(jī)（4位單片微計(jì)算機(jī)）
文件頁(yè)數(shù)：	69/101頁(yè)
文件大小：	610K
代理商：	HD404054

HD404054 Series/HD404094 Series

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 52.

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. After the transfer is completed and IFS is reset, writing to serial mode register 1A (SM1A: $005)

changes the state from transfer to STS wait. At this time serial interface 1 is in the transfer state, and the

serial 1 interrupt request flag is set again, and therefore the error can be detected.

Notes on Use:

Initialization after writing to registers: If port mode register A (PMRA: $004) is written to in transmit

clock wait state or in transfer state, the serial interface must be initialized by writing to serial mode

Serial 1 interrupt request flag (IFS1: $003, bit 2) set: For serial interface 1, if the state is changed from

transfer state to another by writing to serial mode register 1A (SM1A: $005) or executing the STS

instruction during the first low pulse of the transmit clock, the serial 1 interrupt request flag is not set.

To set the serial 1 interrupt request flag, a serial mode register 1A write or STS instruction execution

must be programmed to be executed after confirming that the

SCK

pin is at 1, that is, after executing

the input instruction to port R4.

相關(guān)PDF資料	PDF描述
HD4074054H	4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4054	4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4358	4-bit HMCS400-Series microcomputer
HD404354	4-bit HMCS400-Series microcomputer
HD404354H	4-bit HMCS400-Series microcomputer

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
HD404054H	制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory
HD404054S	制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory
HD404054SERIES/HD404094SERIES	制造商:未知廠家制造商全稱:未知廠家功能描述:
HD404081FT	制造商:未知廠家制造商全稱:未知廠家功能描述:4-Bit Microcontroller
HD404081H	制造商:未知廠家制造商全稱:未知廠家功能描述:4-Bit Microcontroller

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