PIC16LF1903-E/SS Microchip Technology, PIC16LF1903-E/SS Datasheet - Page 155

• Manufacturer Part Number: PIC16LF1903-E/SS
• Description: 7KB Flash, 256B RAM, LCD, 11x10b ADC, NanoWatt XLP 28 SSOP .209in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16LF1903-E/SS

• Processor Series: PIC16LF190x
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Data Ram Size: 256 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 25
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: -
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 25
• Eeprom Size: -
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Lead Free Status / Rohs Status: Details

18.4.3
As an LCD segment is electrically only a capacitor, cur-
rent is drawn only during the interval where the voltage
is switching. To minimize total device current, the LCD
internal reference ladder can be operated in a different
power mode for the transition portion of the duration.
This
(Register
FIGURE 18-4:
 2011 Microchip Technology Inc.
Segment Clock
Segment Data
Ladder Power
32 kHz Clock
LRLAT<2:0>
Power Mode
COM0-SEG0
is
Control
18-7).
controlled
AUTOMATIC POWER MODE
SWITCHING
COM0
SEG0
LCD INTERNAL REFERENCE LADDER POWER MODE SWITCHING DIAGRAM –
TYPE A
‘H00
by
Power Mode A
LRLAT<2:0>
the
‘H01
LCDRL
‘H02
‘H03
Register
Preliminary
Single Segment Time
‘H04
‘H05
The LCDRL register allows switching between two
power modes, designated ‘A’ and ‘B’. ‘A’ Power mode
is active for a programmable time, beginning at the
time when the LCD segments transition. ‘B’ Power
mode is the remaining time before the segments or
commons change again. The LRLAT<2:0> bits select
how long, if any, that the ‘A’ Power mode is active.
Refer to
To implement this, the 5-bit prescaler used to divide
the 32 kHz clock down to the LCD controller’s 1 kHz
base rate is used to select the power mode.
‘H3
Power Mode B
‘H06
Figure
‘H07
PIC16LF1902/3
18-4.
‘H0E
‘H0F
DS41455B-page 155
-V
V
V
V
V
V
V
‘H00
1
0
1
0
1
0
1
Mode A
‘H01