參數(shù)資料
型號: μPD780983
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 48/121頁
文件大?。?/td> 350K
代理商: ΜPD780983
CHAPTER 3 CONTROL
48
3.6.4 INTP0 Safety Stop Processing
Processing starts at the falling edge of the external interrupt input to the INTP0 input pin.
To prevent the occurrence of a safety stop that is caused by noise, INTP0 pin sampling is repeated during
interrupt processing. Stop setting is performed only when two consecutive reads of the active (low) level give the
same value.
Figure 3-12. Safety Stop Conditions
Input
Error signal
40 s min. (IGBT specification)
Input
7 s
During stop setting, output of the 10-bit inverter control timer (TM7) is prohibited and target frequency RFOUT is
set to the stop setting (0FFH).
During main processing, when the target frequency is set to the stop setting, the main mode is also set to the
stop setting. Also, timing set interrupt is prohibited.
3.6.5 Dead Time Input
During other than PWM output processing, to measure the dead time of the CPU, test pin (P66, P67) output is
performed.
Test pin output consists of the processing shown below.
(1)
Inverter output setting (subroutine: INVSET)
P67 is set immediately before the subroutine call of the main loop.
P67 is reset immediately after the subroutine call of the main loop.
(2)
INTTM7 interrupt processing
At the beginning of interrupt processing, P66 is set.
After the completion of interrupt processing, P66 is restored.
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