NJU3503L データシートの表示（PDF） - Japan Radio Corporation

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NJU3503L

4-BIT SINGLE CHIP MICRO CONTROLLER

Japan Radio Corporation  

NJU3503

2) Restart signal Input Selection

PB0 terminal performs the extra function as the restart signal input terminal to return from the

"STANDBY" mode. When the rising edge of the signal from the external circuit is input into the PB0

terminal in mode of "STANDBY", the "STANDBY" mode is released and the CPU starts the execution

again from the suspended address of the program.

3) Edge Detector Selection

PB1 terminal performs the extra function as the edge detector terminal. When the PB1 terminal

detects the edge of the signal from the external circuit, the third bit(b2) condition of PHY18 is set to "1".

The “b2” of PHY18 is set to “1” even when the edge is input during the “STANDBY” mode. The condition

of “b2” is kept until the writing operation to PHY18.

The polarity as low to high or high to low of the input signal edge can be selected by the mask option.

Rising edge

Falling edge

3) External Interrupt of the edge Selection

When PF0 terminal operates as EXTI Input terminal for the external interrupt, the polarity of the edge,

rising as “low to high” or falling as “high to low”, is selected by the mask option.

Rising edge

Falling edge

4) The data order(MSB, LSB) of the Serial Interface

The data order of the Serial Interface can select either MSB or LSB first by the mask option.

5) A/D Control Clock

A/D Control Clock can select either the external clock from ADCK terminal or the internal clock from the

Prescaler by the mask option.

6)Each Internal Clock

The count clocks of Timer1 and Timer2, the Internal shift clock of the Serial Interface, the clock of the

A/D control clock and the output clock through the SCK/CKOUT terminal are clocks divided in the

internal prescaler, and the frequency of this clock can be selected by the mask option from follows which

are dividing numbers based on the inverse of the 1-instruction executing period (1/fOSC x 6).

1/2, 1/4, 1/8, 1/16, 1/32,1/64, 1/128, 1/256, 1/512, 1/1024, 1/2048,1/4096

Note) Count clock of Timer2 can select the internal or external clock by the program.

The shift clock of the serial interface can select the internal or external clock by the program.

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