Microchip Technology AC244055 Hoja De Datos

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DS40001574C-page 327

PIC16(L)F1938/9

27.2

Register Definitions: LCD Control

REGISTER 27-1:

LCDCON: LIQUID CRYSTAL DISPLAY (LCD) CONTROL REGISTER

R/W-0/0

R/C-0/0

U-0

R/W-0/0

R/W-1/1

LCDEN

SLPEN

WERR

—

CS<1:0>

LMUX<1:0>

bit 7

bit 0

Legend:
R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n/n = Value at POR and BOR/Value at all other Resets

‘1’ = Bit is set

‘0’ = Bit is cleared

C = Only clearable bit

bit 7

LCDEN:

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 = LCDDATAn register written while the WA bit of the LCDPS register = 0 (must be cleared in

software)

0 = No LCD write error

bit 4

Unimplemented:

Read as ‘0’

bit 3-2

CS<1:0>:

Clock Source Select bits

00 = F

OSC

/256

01 = T1OSC (Timer1)
1x = LFINTOSC (31 kHz)

bit 1-0

LMUX<1:0>:

Commons Select bits

Note 1:

On these devices, COM3 and SEG15 are shared on one pin, limiting the device from driving 64 pixels.

LMUX<1:0>

Multiplex

Maximum Number of Pixels

Bias

PIC16(L)F1938

PIC16(L)F1939

Static (COM0)

Static

1/2 (COM<1:0>)

1/2 or 1/3

1/3 (COM<2:0>)

1/2 or 1/3

1/4 (COM<3:0>)

(1)

1/3