PD17012_15 Datasheet, PDF (95/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
10.6.5 Configuration and functions of LCD port select register
The LCD port select register specifies whether P2E, P2F, P2G, and P2H are used as LCD segment signal output
pins or as general-purpose output port pins.
The configuration and function of this register are illustrated below.
Name
LCD port select
register
Flag symbol Address
b3 b2 b1 b0
P P P P _11H
2 222
HGFE
S SSS
E EEE
L LLL
Read/
Write
R/W
Selects LCD segment signal output pin or general-purpose output port
0 LCD16/P2E0 is used as LCD segment pin
1 LCD16/P2E0 is used as general-purpose output pin
Selects LCD segment signal output pin or general-purpose output port
0
LCD17/P2F0 is used as LCD segment pin
1
LCD17/P2F0 is used as general-purpose output pin
Selects LCD segment signal output pin or general-purpose output port
0
LCD18/P2G0 is used as LCD segment pin
1
LCD18/P2G0 is used as general-purpose output pin
Selects LCD segment signal output pin or general-purpose output port
0
LCD19/P2H0 is used as LCD segment pin
1
LCD19/P2H0 is used as general-purpose output pin
Power-on
Clock stop
CE
0000
0000
Retained
Ports 2E, 2F, 2G, and 2H can be independently set as general-purpose output ports.
The pins not specified as general-purpose output port pins operate as LCD segment signal output pins.
Data Sheet U10101EJ4V0DS
93