參數(shù)資料
型號: HD404391S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
中文描述: 4位HMCS400系列微電腦(4位單片微計算機(jī))
文件頁數(shù): 66/100頁
文件大小: 610K
代理商: HD404391S
HD404344R Series/HD404394 Series
66
Transmit Clock Error Detection (External Clock Mode):
Serial interface will malfunction if a spurious
pulse caused by external noise conflicts with a normal transmit clock during data transfer. A transmit clock
error of this type can be detected as shown in figure 44.
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 interrupt request flag (IFS: $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 the serial mode register (SMR: $005)
changes the state from transfer to STS wait. At this time the serial interface is in the transfer state, and the
serial interrupt request flag (IFS: $003, bit 2) is set again, and therefore the error can be detected.
Transfer completion
(IFS 1)
Interrupts inhibited
IFS 0
SMR write
IFS = 1
Transmit clock
error processing
Normal
termination
Yes
No
Transmit clock error detection flowchart
Transmit clock error detection procedure
State
SCK
pin (input)
Transmit clock
wait state
Transfer state
Transfer state
Transmit clock wait state
Noise
Transfer state has been
entered by the transmit
clock error. When SMR is
written, IFS is set.
Flag set because octal
counter reaches 000.
Flag reset at
transfer completion.
SMR write
IFS
1
2
3
4
5
6
7
8
Figure 44 Transmit Clock Error Detection
相關(guān)PDF資料
PDF描述
HD404392S 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD404341R 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD404394S 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD404612 4-Bit Single-Chip Microcomputer
HD404612FS 4-Bit Single-Chip Microcomputer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404392 制造商:未知廠家 制造商全稱:未知廠家 功能描述:HMCS43XXFamily User's Manual/Device
HD404392FP 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
HD404392FT 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
HD404392S 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers
HD404394 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit microcomputer has an A/D converter