ML9042 datasheet(4/58 Pages) LAPIS

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FEDL9042-01

LAPIS Semiconductor

ML9042-xx

4/58

PIN DESCRIPTIONS

Symbol

Description

RW/SI

The input pin with a pull-up resistor to select Read (“H”) or Write (“L”) in the Parallel I/F

Mode.

The pin to input data in the Serial l/F Mode. Each instruction code and each data are

read in by the rising edge of the E/SHTB signal.

RS0/CSB, RS1

The input pins with a pull-up resistor to select a register in the Parallel l/F Mode.

The RSo/CSB pin is configured as a chip enable input in the Serial I/F Mode. Setting

the RSo/CSB pin to “L” allows the I/F to be provided.

E/SHTB

The input pin for data input/output between the CPU and the ML9042 and for

activating instructions in the Parallel l/F Mode.

This pin is configured as a shift clock input in the Serial I/F Mode. The data input to the

PW/SI pin is synchronized to the rising edge of the clock, and the data output from the

DB0(SO) pin is synchronized to the falling edge of the shift clock.

DB0(SO) to DB3

The input/output pins to transfer data of lower-order 4 bits between the CPU and the

ML9042 in the Parallel l/F Mode. The pins are not used for the 4-bit interface.

Only the DB0(SO) pin is configured as a data output in the Serial I/F Mode. Busy flag

& address and data are output synchronized to the falling edge of the E/SHTB signal.

These pins remain pulled up when data is not output.

Each pin is equipped with a pull-up resistor, so this pin should be open when not used.

DB4 to DB7

The input/output pins to transfer data of upper 4 bits between the CPU and the

ML9042 in the Parallel l/F Mode. The pins are not used for the serial interface.

Each pin is equipped with a pull-up resistor, so this pin should be open in the Serial I/F

Mode when not used.

OSC1

OSC2

OSCR3

OSCR5

The clock oscillation pins required for LCD drive signals and the operation of the

ML9042 by instructions sent from the CPU.

To input external clock, the OSC1 pin should be used. The OSCR3, OSCR5, and OSC2

pins should be open.

To start oscillation with an external resistor, the resistor should be connected between

the OSC1 and OSC2 pins. The OSCR3 and OSCR5 pins should be open.

To start oscillation at 5 V using an internal resistor, the OSC2 and OSCR5 pins should

be short-circuited outside the ML9042. The OSC1 and OSCR3 pins should be open.

To start oscillation at 3 V using an internal resistor, the OSC2 and OSCR3 pins should

be short-circuited outside the ML9042. The OSC1 and OSCR5 pins should be open.

(The OSC2, OSCR3, and OSCR5 pins can also be short-circuited outside the ML9042,

and the OSC1 pin can be open.)

COM1 to COM17

The LCD common signal output pins.

For 1/8 duty, non-selectable voltage waveforms are output via COM9 to COM17. For

1/9 duty, non-selectable voltage waveforms are output via COM10 to COM17. For 1/16

ML9042 Datasheet(PDF) 4 Page - LAPIS Semiconductor Co., Ltd.

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