ML9489 datasheet(10/32 Pages) ETC2

10 / 32 page

FEDL9489-02

ML9489

10/32

PIN DESCRIPTIONS

Pad

number

Symbol

I/O

Description

109-112

M/S

This is the input to switch between the master and slave modes. It has a

schmitt circuit. When this pin is "H", the mode is master. When this pin is "L",

the mode is slave.

9-12

13-16

Duty0

Duty1

Display duty switch pins. These have schmitt circuits.

Duty0="L", Duty1="L" : Static

(COM1=COM2=COM3=COM4)

Duty0="H", Duty1="L" : 1/2Duty

(COM1=COM3, COM2=COM4)

Duty0="L", Duty1="H" : 1/3Duty

(COM2=COM4)

Duty0="H", Duty1="H" : 1/4Duty

121-124

BIAS

This pin sets the LCD bias. It has a schmitt circuit.

BIAS="L": 1/3bias

BIAS="H": 1/2bias

When the static mode selection, fix this pin at “H” or “L” level.

25-28

SA0

Slave address input pin. It has a schmitt circuit.

17-20

21-24

Sub address input pins. These have schmitt circuits.

117-120

OSC I/E

This input selects whether to use the external clock input mode or to use the

Internal oscillation mode or external oscillation mode. It has a schmitt circuit.

When this pin is "H", the mode is the Internal or external Rf oscillation mode.

When this pin is "L", the mode is the external clock input mode.

Use the slave chip as it is connected to GND.

78-82

83-87

88-82

OSC1,

OSCR,

OSC2

These pins are for the oscillator circuit to generate common signals.

The OSC1 and OSCR pins are input pins and have a schmitt circuit.

OSC2 is an output pin. It becomes an output when the OSC I/E pin = "H" and

a high impedance when the OSC I/E pin = "L".

【

In the master mode (M/S pin ="H") 】

Three types are selectable: Internal oscillation mode, external oscillation

mode, and external clock input mode.

•Internal oscillation mode: Set the OSC I/E pin to "H", short the OSCR and

OSC2 pins, and open the OSC1 pin.

•External Rf oscillation mode: Set the OSC I/E pin to "H", connect an

oscillation resistor Rf between the OSC1 and OSC2 pins, and open the

OSCR pin.

•External clock input mode: Set the OSC I/E pin to "L", open the OSCR and

OSC2 pins, and input the external clock to the OSC1 pin.

【

In the slave mode (M/S pin ="L") 】

Open the OSCR and OSC2 pins and connect the OSC1 pin to the

ML9489's CKO pin that has been set to the master mode.

93-97

CKO

Clock output pin.

In the master mode (M/S pin = "H"), the 1/16 division signal of the oscillation

frequency is output.

In the slave mode (M/S pin = "L"), the output is fixed to "L".

For a cascade connection, connect this pin to the OSC1 pin of the chip that

has been set to the slave mode.

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