UPD16682AW Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPD16682AW

1/65 DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM

NEC => Renesas Technology 

µPD16682A

3.2 Logic System Pins (2/3)

Pin Symbol

Pin Name

Pad No. I/O

Description

FR

Frame signal

3

Input This pin is used as an I/O pin for the LCD’s AC conversion

/Output signal.

This pin is used (along with the FRS pin) for the static drive.

FRS

Static signal

2

Output This pin is used as an output pin for the static drive.

This pin is used (along with the FR pin) for the static drive.

M,/S

Master/Slave

79

Input This pin is used to select master or slave operation mode.

Timing signals required for the LCD are output during master

mode and are input during slave mode to ensure synchronization

of the LCD block.

M,/S = H: Master operation mode

M,/S = L: Slave operation mode

Note the settings below, based on the status of the M,/S and

CLS pins.

M,/S CLS Oscillation Power CL

Circuit supply

circuit

FR FRS /DOF

H

H Valid Valid Output Output Output Output

L Invalid Valid Input Output Output Output

L

H Invalid Invalid Input Input Hi-Z Input

L Invalid Invalid Input Input Hi-Z Input

CL

Display clock input

4

Input This pin is used as the display clock I/O pin. Note the settings

/Output below, based on the status of the M,/S and CLS pins.

M,/S

CLS

CL

H

H

Output

L

Input

L

H

Input

L

Input

When using this pin in master or slave mode, connect it to the

corresponding CL pin.

/DOF

Blink control

5

Input This pin is used to control blinking in the LCD.

/Output M,/S = H : Output

M,/S = L : Input

When using this pin in master or slave mode, connect it to the

corresponding /DOF pin.

HPM

Power supply circuit select 85

pin for LCD driver

Input

This pin is used as a power control pin of the power supply circuit

for the LCD driver.

HPM = H : Normal mode

HPM = L : High-power mode

IRS

Select pin for VLC1

regulating resistor

87

Input This pin is used to select the resistor that is used to regulate the

VLC1 voltage.

IRS = H : Select on-chip resistor

IRS = L : Do not select on-chip resistor. The VLC1 voltage is

regulated via the VR pin and an external divided

resistor.

Use of the on-chip resistor cannot be selected or deselected via

a hard reset or via a reset command. Instead, use this pin to

select the setting.

Data Sheet S14402EJ1V0DS

9

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