Microchip Technology DM164130-7 Data Sheet

PIC16(L)F1946/47

DS41414D-page 348

 2010-2012 Microchip Technology Inc.

27.6

Register Definitions: LCD Ladder Control

REGISTER 27-7:

LCDRL: LCD REFERENCE LADDER CONTROL REGISTERS

R/W-0/0

U-0

R/W-0/0

LRLAP<1:0>

LRLBP<1:0>

—

LRLAT<2:0>

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

bit 7-6

LRLAP<1:0>: LCD Reference Ladder A Time Power Control bits
During Time interval A (Refer to

Figure 27-4

00 =  Internal LCD Reference Ladder is powered down and unconnected
01 =  Internal LCD Reference Ladder is powered in Low-Power mode
10 =  Internal LCD Reference Ladder is powered in Medium-Power mode
11 =  Internal LCD Reference Ladder is powered in High-Power mode

bit 5-4

LRLBP<1:0>: LCD Reference Ladder B Time Power Control bits
During Time interval B (Refer to

Figure 27-4

bit 3

Unimplemented: Read as ‘0’

bit 2-0

LRLAT<2:0>: LCD Reference Ladder A Time interval control bits
Sets the number of 32 kHz clocks that the A Time interval power mode is active

For type A waveforms (WFT = 0):

000 = Internal LCD Reference Ladder is always in ‘B’ Power mode
001 = Internal LCD Reference Ladder is in ‘A’ Power mode for 1 clock and ‘B’ Power mode for 15 clocks
010 = Internal LCD Reference Ladder is in ‘A’ Power mode for 2 clocks and ‘B’ Power mode for 14 clocks
011 = Internal LCD Reference Ladder is in ‘A’ Power mode for 3 clocks and ‘B’ Power mode for 13 clocks
100 = Internal LCD Reference Ladder is in ‘A’ Power mode for 4 clocks and ‘B’ Power mode for 12 clocks
101 = Internal LCD Reference Ladder is in ‘A’ Power mode for 5 clocks and ‘B’ Power mode for 11 clocks
110 = Internal LCD Reference Ladder is in ‘A’ Power mode for 6 clocks and ‘B’ Power mode for 10 clocks
111 = Internal LCD Reference Ladder is in ‘A’ Power mode for 7 clocks and ‘B’ Power mode for 9 clocks

For type B waveforms (WFT = 1):

000 = Internal LCD Reference Ladder is always in ‘B’ Power mode.
001 = Internal LCD Reference Ladder is in ‘A’ Power mode for 1 clock and ‘B’ Power mode for 31 clocks
010 = Internal LCD Reference Ladder is in ‘A’ Power mode for 2 clocks and ‘B’ Power mode for 30 clocks
011 = Internal LCD Reference Ladder is in ‘A’ Power mode for 3 clocks and ‘B’ Power mode for 29 clocks
100 = Internal LCD Reference Ladder is in ‘A’ Power mode for 4 clocks and ‘B’ Power mode for 28 clocks
101 = Internal LCD Reference Ladder is in ‘A’ Power mode for 5 clocks and ‘B’ Power mode for 27 clocks
110 = Internal LCD Reference Ladder is in ‘A’ Power mode for 6 clocks and ‘B’ Power mode for 26 clocks
111 = Internal LCD Reference Ladder is in ‘A’ Power mode for 7 clocks and ‘B’ Power mode for 25 clocks