PIC16F1947-I/PT Microchip Technology Inc., PIC16F1947-I/PT Datasheet - Page 345
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PIC16F1947-I/PT
Manufacturer Part Number
PIC16F1947-I/PT
Description
64 TQFP 10x10x1mm TRAY28KB Flash, 1KB RAM, 256B EEPROM, LCD, 1.8-5.5V
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16LF1946-IPT.pdf
(448 pages)
Specifications of PIC16F1947-I/PT
A/d Inputs
17-Channel, 10-Bit
Comparators
3
Cpu Speed
8 MIPS
Eeprom Memory
256 Bytes
Input Output
54
Interface
CAN/I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
64-pin TQFP
Programmable Memory
28K Bytes
Ram Size
1K Bytes
Speed
32 MHz
Timers
4-8-bit, 1-16-bit
Voltage, Range
1.8-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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27.4.3
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 27-4:
2010 Microchip Technology Inc.
Segment Clock
Segment Data
Ladder Power
32 kHz Clock
LRLAT<2:0>
Power Mode
COM0-SEG0
is
Control
27-7).
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
PIC16F/LF1946/47
Figure
‘H07
27-4.
‘H0E
‘H0F
DS41414B-page 345
-V
V
V
V
V
V
V
‘H00
1
0
1
0
1
0
1
Mode A
‘H01
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