PIC16LF1902-ESS 查看數據表（PDF） - Microchip Technology

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PIC16LF1902-ESS

28-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

Microchip Technology 

PIC16LF1902/3

REGISTER 18-7: LCDRL: LCD REFERENCE LADDER CONTROL REGISTERS

R/W-0/0

R/W-0/0

R/W-0/0

R/W-0/0

U-0

R/W-0/0

R/W-0/0

LRLAP<1:0>

LRLBP<1:0>

—

LRLAT<2:0>

bit 7

R/W-0/0

bit 0

Legend:

R = Readable bit

u = Bit is unchanged

‘1’ = Bit is set

W = Writable bit

x = Bit is unknown

‘0’ = Bit is cleared

U = Unimplemented bit, read as ‘0’

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

bit 7-6

bit 5-4

bit 3

bit 2-0

LRLAP<1:0>: LCD Reference Ladder A Time Power Control bits

During Time interval A (Refer toFigure 18-4):

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

LRLBP<1:0>: LCD Reference Ladder B Time Power Control bits

During Time interval B (Refer to Figure 18-4):

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

Unimplemented: Read as ‘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

DS41455A-page 156

Preliminary

 2011 Microchip Technology Inc.

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