Datasheet

RL78/L12 CHAPTER 14 LCD CONTROLLER/DRIVER
R01UH0330EJ0200 Rev.2.00 603
Dec 13, 2013
Table 14-1. Number of LCD Display Function Pins of Each Product (3/3)
(c) 64-pin products
Part No.
Item
RL78/L12
64 pins (R5F10RLx (x = C, A))
Number of LCD output pins Segment signal outputs: 39 (35)
Note
Common signal outputs: 8
Correspondence
between
multiplexed
segment signal
output pin
functions and I/O
port pin functions
x
I/O port
7 6 5 4 3 2 1 0
P1x SEG6 SEG5 SEG4 SEG32 SEG31 SEG30 SEG29 SEG28
P3x
− − − − −
SEG17 SEG18 SEG19
P4x
− − − −
SEG22 SEG23 SEG24
−
P5x
− − −
SEG11 SEG10 SEG9 SEG8 SEG7
P6x
− − − − − −
SEG20 SEG21
P7x
− − −
SEG12 SEG13 SEG14 SEG15 SEG16
P12x
− − − − − − −
SEG25
P14x SEG38 SEG37 SEG36 SEG35 SEG34 SEG33 SEG26 SEG27
Correspondence between
multiplexed COM signal output pin
functions and I/O port pin functions
−
Correspondence between
multiplexed COM signal output pin
functions and other LCD display pin
functions
SEG0
SEG1
SEG2
SEG3
Note ( ) indicates the number of signal output pins when 8 com is used.
14.1 Functions of LCD Controller/Driver
The functions of the LCD controller/driver in the RL78/L12 microcontrollers are as follows.
(1) Waveform A or B selectable
(2) The LCD driver voltage generator can switch internal voltage boosting method, capacitor split method, and
external resistance division method.
(3) Automatic output of segment and common signals based on automatic display data register read
(4) The reference voltage to be generated when operating the voltage boost circuit can be selected from 16 steps
(contrast adjustment).
(5) The LCD can be made to blink
Note
Note Selecting f
IL as the LCD source clock (fLCD) is prohibited.
<R>
<R>
<R>
<R>