ST7533 datasheet(43/60 Pages) SITRONIX

43 / 60 page

ST7533

Ver 1.0

43/60

2003/07/21

(2) Data Display

Notes: Reference items

*9: Command Description; Display start line set

*10: Command Description; Page address set

*11: Command Description; Column address set

*12: Command Description; Display data write

*13: Command Description; Display ON/OFF

Avoid displaying all the data at the data display start (when the display is ON) in white.

(3) Power OFF *14

Notes: Reference items

*14: The logic circuit of this IC’s power supply VDD - VSS controls the driver of the LCD power supply VDD - V5. So, if the

power supply VDD - VSS is cut off when the LCD power supply VDD - V5 has still any residual voltage, the driver

(COM. SEG) may output any uncontrolled voltage. When turning off the power, observe the following basic

procedures:

• After turning off the internal power supply, make sure that the potential V5 ~ V1 has become below the threshold

voltage of the LCD panel, and then turn off this IC’s power supply (VDD - VSS). 6. Description of Function, 6.7 Power

Circuit

*15: After inputting the power save command, be sure to reset the function using the /RES terminal until the power

supply VDD - VSS is turned off. 7. Command Description (20) Power Save

*16: After inputting the power save command, do not reset the function using the /RES terminal until the power supply

VDD - VSS is turned off. 7. Command Description (20) Power Save

Function setup by command input (User

setup)

(2) Display start line set *9

(3) Page address set *10

(4) Column address set *11

Function setup by command input (User

setup)

(6) Display data write *12

End of data display

Function setup by command input (User

setup)

(1) Display ON/OFF *13

End of initialization

Function setup by command input (User

setup)

(20) Power save *15

VDD – VSS power OFF

Reset active (RES pin = “L”)

Optional status

Set the time (

tL) from reset

active to turning off the VDD -

VSS power (VDD - VSS = 1.8V)

longer than the time (

tH) when

th e p o te nti a l of V 5 ~ V 1

becomes below the threshold

voltage (approximately 1V) of

the LCD panel. For

tH, refer to

the <Reference Data> of this

event. When

tH is too long,

insert a resistor between V5

and VDD to reduce it.

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