Document Number: 002-07700 Rev. *B

Page 13 of 52

MB90595G Series

(12) Initialization

The device contains internal registers which are initialized only by a power-on reset. To initialize these registers, please turn on the

power again.

(13) Directions of “DIV A, Ri” and “DIVW A, RWi” instructions

In the signed multiplication and division instructions (“DIV A, Ri” and “DIVW A, RWi”), the value of the corresponding bank register

result of the instruction is not stored in the register of the instruction operand.

(14) Using REALOS

(15) Caution on Operations during PLL Clock Mode

If the PLL clock mode is selected in the microcontroller, it may attempt to continue the operation using the free-running frequency of

the automatic oscillating circuit in the PLL circuitry even if the oscillator is out of place or the clock input is stopped. Performance of

this operation, however, cannot be guaranteed.

Vcc (Power-supply pin)

PONR (power-on reset) signal

RST (external asynchronous reset) signal

RST (internal reset) signal

Oscillation clock signal

KA (internal operation clock A) signal

KB (internal operation clock B) signal

PORT (port output) signal

High-impedance

*1:Power-on reset time: Period of “clock frequency

*2:Oscillation setting time: Period of “clock frequency

RST pin is “L”