Datasheet
PIC18F97J94 FAMILY
DS30575A-page 246 2012 Microchip Technology Inc.
13.1 LCD Registers
The LCD controller has up to 77 registers:
• LCD Control Register (LCDCON)
• LCD Phase Register (LCDPS)
• LCD Voltage Regulator Control Register
(LCDREG)
• LCD Reference Ladder Control Register
High/Low (LCDREFH and LCDREFL)
• Eight LCD Segment Enable Registers
(LCDSE7:LCDSE0)
• 64 LCD Data Registers
(LCDDATA63:LCDDATA0)
The LCDCON register, shown in Register 13-1, con-
trols the overall operation of the module. Once the
module is configured, the ON (LCDCON<15>) bit is
used to enable or disable the LCD module. The LCD
panel can also operate during Sleep by clearing the
SLPEN (LCDCON<6>) bit.
The LCDPS register, shown in Register 13-3, configures
the LCD clock source prescaler and the type of wave-
form: Type-A or Type-B. For details on these features,
see Section 13.3 “LCD Clock Source Selection” and
Section 13.12 “LCD Waveform Generation”.
REGISTER 13-1: LCDCON: LCD CONTROL REGISTER
R/W-0 R/W-0 R/C-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ON
SLPEN WERR CS1 CS0 LMUX2 LMUX1 LMUX0
bit 7 bit 0
Legend: C = Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ON: LCD Driver Enable bit
1 = LCD driver module is enabled
0 = LCD driver module is disabled
bit 6 SLPEN: LCD Driver Enable in Sleep mode bit
1 = LCD driver module is disabled in Sleep mode
0 = LCD driver module is enabled in Sleep mode
bit 5 WERR: LCD Write Failed Error bit
1 = LCDDATAx register is written while WA (LCDPS<4>) = 0 (must be cleared in software)
0 = No LCD write error
bit 4-3 CS<1:0>: Clock Source Select bits
00 = FRC (8 MHz)/8192
01 = SOSC Oscillator (32.768 kHz)/32
1x = INTRC (31.25 kHz)/32
bit 2-0 LMUX<2:0>: Commons Select bits
LMUX<2:0> Multiplex Bias
111 1/8 MUX (COM<7:0>) 1/3
110 1/7 MUX (COM<6:0>) 1/3
101 1/6 MUX (COM<5:0>) 1/3
100 1/5 MUX (COM<4:0>) 1/3
011 1/4 MUX (COM<3:0>) 1/3
010 1/3 MUX (COM<2:0>) 1/2 or 1/3
001 1/2 MUX (COM<1:0>) 1/2 or 1/3
000 Static (COM0) Static