PIC16LF1904/6/7
DS41569A-page 198
Preliminary
2011 Microchip Technology Inc.
REGISTER 19-7:
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
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
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 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