Output Port Selection By Mask Option - Oki ML63611 User Manual

13.5

Output Port Selection by Mask Option

The four pins L32 to L35 of the LCD driver can be selected by mask option setting to form an output port in 4-bit
unit.
When these pins are specified as an output port, one bit of the segment register will be allocated to one pin of the
port.
Figure 13-7 shows an example of the equivalent circuit when the pins L32 to L35 are allocated collectively as an
output port. In this case, the output voltage level will be V
output.
The output mode can be selected to be either N-channel open drain output or CMOS output using the register
LP0CON.
Figure 13-7 Equivalent Circuit When the LCD Driver Pins L32 to L35 Are Assigned as Output
Port Pins
For details of the method of assigning the bits of the segment register for the output pins, and of specifying the
output port, refer to the "MOGTOOL Mask Option Generator User's Manual".
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
Data bus
4
3
2
Segment
1 register
0
Read/Write
for the "H" level output and V
DD
V
DD
Inside the IC
13 – 11
OPTION B (D): 1.5 V (3.0 V), With regulator
ML63611 User's Manual
Chapter 13 LCD Driver (LCD)
for the "L" level
SS
L32/LP0.3
L33/LP0.2
L34/LP0.1
L35/LP0.0
circuit for LCD bias