User`s manual

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3.4.4 Control Input Signals (/RES, /NMI, /BREQ, /WAIT, and /STBY)
The H8SX/1600-series MCU control input signals are /RES, /NMI, /BREQ, /WAIT, and /STBY. The /RES,
/NMI, and /STBY signals are only valid when emulation was started with normal program execution (i.e., they
are invalid when emulation was started with step execution). The /BREQ and /WAIT signals are valid during
emulation with the display and modification of memory contents, execution, and step execution. While
emulation is being halted (break), the input of the /RES or /NMI signal to the MCU is not possible.
The input of the /RES, /NMI, /STBY, /BREQ, or /WAIT signal during execution or step execution can be
disabled by a setting in the [Configuration] dialog box.
3.4.5 Watchdog Timer (WDT)
When emulation is suspended (i.e. by a break), counting up by the WDT timer counter (TCNT) is also suspended.
Counting resumes when emulation is resumed (user mode).
During break mode, a prescaler, which supplies a clock to TCNT, operates continuously. Since the prescaler
might be in different phases before and after emulation goes through a period in the break mode, a break can
change the period before the WDT overflows by ±1 cycle of the prescaler’s clock.
3.4.6 A/D Converter
As well as analog input pins, the A/D converter has AVcc, AVss, Avref, and /ADTRG pins. As the A/D
converter operates with an independent power supply, connect AVcc (the power supply pin) to the A/D power
supply on the user system.
Notes: 1. When the A/D converter is not in use, connect AVcc to Vcc.
2. As the user system interface cable, wiring on the printed circuit board, and protective circuits are
connected between the user system and the evaluation chip on the evaluation chip board, the
precision of conversion is lower than that of the H8SX/1600-series MCU.