M16C User Manual.pdf

Appendix 1Mitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERDoes not instruction DMA transfer occur between the instruction writing is enabled in the protectregister and the instruction writing in the port P9 direction register starts?Is writing enabled in the protect register before writing in the SI/Oi (i=3,4) control register (address036216, 036616)?Is writing effectuated in the SI/Oi (i=3,4) control register by the next instruction after writing is enabledin the protect register?Does not an interrupt generate between the instruction writing is enabled in the protect register andthe instruction writing in the SI/Oi (i=3,4) control register?Does not instruction DMA transfer occur between the instruction writing is enabled in the protectregister and the instruction writing in the SI/Oi (i=3,4) control register starts?Checks regarding the timerIs the timer started after a value is set in the timer register?Checks regarding InterruptWhen rewrite the interrupt register, do so at a point that does not generate the interruput request?Checks regarding low voltage and low power consumptionWhen using at low voltage, have you checked recommended operating conditions and changed thewait bit (address 000516, bit 7) to “1”?Does the oscillator to which the count source is going to be switched be oscillating stably, before thecount source for BCLK can be changed from XIN to XCIN or vice versa?In the low power consumption mode, does not current flow from Vref when the Vref connection bit (bit5 in address 03D716) is set?Is not voltage level of port floating in the low power consumption mode?Checks regarding A-D converterHave you selected other than fAD (no dividing) for øAD when using the A-D converter at VCC = 2.7Vto 4.0V?Have you selected no sample & hold function when using the A-D converter at VCC = 2.7V to 4.0V?Have you selected 8-bit mode when using the A-D converter at VCC = 2.7V to 4.0V?Does øAD use it by less than 10MHZ?568