LC75852E-E ON Semiconductor, LC75852E-E Datasheet - Page 14

• Manufacturer Part Number: LC75852E-E
• Description: LCD Drivers LCD DISPLAY DRIVER
• Manufacturer: ON Semiconductor

Specifications of LC75852E-E

• Rohs: yes
• Operating Supply Voltage: 4.5 V to 6 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: QIP-64E
• Maximum Power Dissipation: 200 mW

Notes on Controller Key Data Read Techniques
1. Controller key data reading under timer control
t3 ..................Key scan execution time (800T [s]) when the key scan data for two key scans agrees
t4 ..................Key scan execution time (1600T [s]) when the key scan data for two key scans does not agree and a key scan is executed again
t5 ..................Key address (43H) transfer time
t6 ..................Key data read time
T =
• Flowchart
• Timing Chart
• Description
f
OSC
1
When determining key on/off and reading key data, the controller must confirm the state of DO output when CE is
low for each period t7. When DO is low, the controller recognizes that a key has been pressed and reads the key
data.
During this operation t7 must obey the following condition:
t7 > t5 + t6 + t4
If key data is read when DO is high, the key data (KD1 to KD30) and the sleep acknowledge data (SA) will be
invalid.
LC75852E, 75852W
No. 4828-14/16