Fujitsu F2MC-8FX Hardware Manual page 463

Table 24.4-2 Functions of Bits in LCDC Enable Register 1 (LCDCE1)
Bit name
PICTL:
bit7
Port input control bit
BLSEL:
bit6 Blinking interval select
bit
bit5 Reserve bit
VE1:
bit4
V3 to V1 select bit
COM3:
bit3
COM3 select bit
COM2:
bit2
COM2 select bit
COM1:
bit1
COM1 select bit
COM0:
bit0
COM0 select bit
Note:
When using internal split resistors, set the VE1 bit to "1". The V3 to V1 pins cannot be used as
general-purpose output ports.
Controls the port I/O pins that also serve as segment or common outputs.
Setting the bit to "0": Shuts off the port inputs and suppresses shoot-through current during LCD
output. Shuts off the port output.
Setting the bit to "1": Enables the pins for port I/O. Set the bit to 1 to use the pins as ports.
Note: As the port inputs are disconnected at a reset, be sure to set the bit to "1" if you wish to use
the pins as port inputs.
When used as the segment and common, the port inputs are disconnected regardless of this
bit.
Selects the blinking interval when blinking is enabled(in product of single system clock, this bit
has no effect).
Blinking is enabled by LCDC blinking setting registers 1 and 2 (LCDCB1, LCDCB2).
The setting "1.0s" causes the LCD to remain on for 0.5s and off for 0.5s; the setting "0.5s" causes it
to remain on for 0.25s and off for 0.25s.
reserve bit
always set 0
read value is 0
Selects the status of the V3 pin to V1 pin.
Setting the bit to "0": Causes the pins to function as general-purpose I/O ports.
Setting the bit to "1": Causes the pins to function as the V3 pin to V1 pin.
Selects the status of the COM3 pin.
Setting the bit to "0": Causes the pin to function as a general-purpose I/O port.
Setting the bit to "1": Causes the pin to function as the COM3 pin.
Selects the status of the COM2 pin.
Setting the bit to "0": Causes the pin to function as a general-purpose I/O port.
Setting the bit to "1": Causes the pin to function as the COM2 pin.
Selects the status of the COM1 pin.
Setting the bit to "0": Causes the pin to function as a general-purpose I/O port.
Setting the bit to "1": Causes the pin to function as the COM1 pin.
Selects the status of the COM0 pin.
Setting the bit to "0": Causes the pin to function as a general-purpose I/O port.
Setting the bit to "1": Causes the pin to function as the COM0 pin.
CHAPTER 24 LCD CONTROLLER
Function
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