Control Register 2 (Lr1) - Renesas F-ZTAT H8 Series Hardware Manual

Bit 5—Module Standby (LSBY): Bit 5 is the module standby setting bit. When LSBY is set to 1,
the LCD controller enters standby mode. At this time, bits DISP, LPS1, and LPS0 in LR1 are
reset.
Bit 5: LSBY Description
0 LCD controller operates normally
1 Power supply to built-in bleeder resistances halts, display is turned off, and LCD
controller enters standby mode
Bits 4 to 2—Reserved Bits: Bits 4 to 2 are reserved; they should always be cleared to 0.
Bit 1—Display Duty Select (DDTY1): Bit 1 selects a display duty of 1/16 or 1/8.
Bit 1: DDTY1 Description
0 1/16 duty selected
1 1/8 duty selected
Y address H'8 to H'F display data is invalid
Bit 0—Reserved Bit: Bit 0 is reserved; it should always be cleared to 0.
14.2.3

Control Register 2 (LR1)

Bit
7
⎯
⎯
Initial value
⎯
Read/Write
LR1 is an 8-bit write-only register that selects operation or halting of LCD display and supply or
halting of current to the built-in bleeder resistances, performs read-modify-write mode setting, and
selects the address to be incremented in the display memory.
Upon reset, LR1 is initialized to H'00.
Bit 7—Reserved Bit: Bit 7 is reserved; it should always be cleared to 0.
6 5
DISP LPS1 LPS0
0 0
W W
14. Dot Matrix LCD Controller (H8/3854 Group)
4 3
⎯
RMW
⎯
0 0
⎯
W W
Rev.3.00 Jul. 19, 2007 page 379 of 532
(initial value)
(initial value)
2 1
⎯
INC
⎯
0
⎯
W
REJ09B0397-0300
0