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MB90420/5 (A) SERIES F
Table 14-5 Relationship between Common/Segment Output Pins and Display RAM, and Pins also
Value of SEG5 to
SEG0 Bits of LCRH
Register
00_0000
B
00_0001
B
00_0011
B
00_0111
B
00_1111
B
01_1111
B
11_1111
B
Note: RAM areas that are not used for LCD display can be used as normal RAM.
Table 14-6 Relationship between Duty, Common Output Pins, and Display RAM Bits
Common Output Pins
Duty Setting
Used
1/2
COM0, COM1 (2 pins)
1/3
COM0 to COM2 (3 pins)
1/4
COM0 to COM3 (4 pins)
{
: Used
–– : Unused
2
MC-16LX FAMILY 16-BIT MICROCONTROLLERS HARDWARE MANUAL
Serving as General-purpose Ports
Segment Output Pins Used
SEG00 to SEG11 (12 pins)
SEG00 to SEG15 (16 pins)
SEG00 to SEG19 (20 pins)
SEG00 to SEG20 (21 pins)
SEG00 to SEG21 (22 pins)
SEG00 to SEG22 (23 pins)
SEG00 to SEG23 (24 pins)
RAM Area Used
for LCD Display
3960
to 3965
P36, P37, P40 to P47, P90, P91
H
H
3960
to 3967
P42 to P47, P90, P91
H
H
3960
to 3969
P46 to P47, P90, P91
H
H
3960
to 396A
P47, P90, P91
H
H
3960
to 396A
P90, P91
H
H
3960
to 396B
P91
H
H
3960
to 396B
None
H
H
Bits for Display Data
bit 7
bit 6
bit 5
bit 4
{
{
––
––
{
{
{
––
{
{
{
{
14-18
Pins Used as General-Purpose
Ports
bit 3
bit 2
bit 1
{
––
––
{
{
––
{
{
{
bit 0
{
{
{
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