UPD78F9418A NEC, UPD78F9418A Datasheet - Page 208

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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14.4 Setting LCD Controller/Driver
14.5 LCD Display Data Memory
can be displayed on the LCD panel using the LCD controller/driver.
segment/common outputs.
208
Figure 14-5. Relationship Between LCD Display Data Memory Contents and Segment/Common Outputs
Set the LCD controller/driver using the following procedure.
<1> Set the initial values in the LCD display data memory (FA00H to FA1BH).
<2> Set the pins to be used for segment output in LCD port selector 0 (LPS0).
<3> Set the display and operation modes in LCD display mode register 0 (LCDM0).
<4> Set the LCD clock in LCD clock control register 0 (LCDC0).
Subsequent to this procedure, set the data to be displayed in the data memory.
The LCD display data memory is mapped at addresses FA00H to FA1BH. Data in the LCD display data memory
Figure 14-5 shows the relationship between the contents of the LCD display data memory and the
The part of the display data memory not used for display can be used as ordinary RAM.
Caution No memory is allocated to the higher 4 bits of the LCD display data memory. Be sure to fix
there bits to 0.
Address
FA1AH
FA1BH
FA00H
FA01H
FA02H
FA03H
FA09H
b
7
b
6
CHAPTER 14 LCD CONTROLLER/DRIVER
b
5
User’s Manual U13952EJ3V0UD
b
4
COM3
b
3
COM2
b
2
COM1
b
1
COM0
b
0
S0
S1
S2
S3
S25/P82
S26/P81
S27/P80