NEC UPD703116 User Manual page 650

32-bit single-chip microcontrollers

Table of Contents

(3) A/D voltage detection mode registers 0 and 1 (ADETM0, ADETM1)

The ADETMn registers are 16-bit registers that set voltage detection mode. In voltage detection mode, the

analog input pin for which voltage detection is being performed and a reference voltage value are compared

and an interrupt is set in response to the comparison result.

The ADETMn register can be read/written in 16-bit units.

When the higher 8 bits of the ADETMn register are used as the ADETMnH register, and the lower 8 bits are

used as the ADETMnL register, they can be read/written in 8-bit or 1-bit units.

Caution Do not write to an ADETMn register during A/D conversion operation.

performed, conversion is suspended and it subsequently terminates.

Bit position

CHAPTER 13 A/D CONVERTER

Specifies voltage detection mode.

0: Operate in normal mode

1: Operate in voltage detection mode

Sets voltage comparison detection.

0: Generate INTDETn interrupt if reference voltage value > analog input pin voltage.

1: Generate INTDETn interrupt if reference voltage value ≤ analog input pin voltage.

Selects analog input pin to compare to reference voltage value set by DETCMP9 to

DETCMP0 when in voltage detection mode.

×: Arbitrary

Sets reference voltage value to compare with analog input pin selected in DETANI3 to

User's Manual U14492EJ5V0UD

Voltage detection analog input pin

Setting prohibited

If a write is

Initial value

Initial value