PIC16F74-I/ML Microchip Technology, PIC16F74-I/ML Datasheet - Page 465

• Manufacturer Part Number: PIC16F74-I/ML
• Description: IC MCU FLASH 4KX14 A/D 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F74-I/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFN
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8
• For Use With: XLT44QFN2 - SOCKET TRAN ICE 44QFN/40DIPAC164322 - MODULE SOCKET MPLAB PM3 28/44QFN444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

25.3.2
1997 Microchip Technology Inc.
Multiplex Timing Generation
The timing generation circuitry will generate 1 to 4 common’s based on the display mode
selected. The mode is specified by bits LMUX1:LMUX0 (LCDCON<1:0>).
formulas for calculating the frame frequency.
Table 25-1: Frame Frequency Formulas
Table 25-2: Approximate Frame Frequency in Hz using Timer1 @ 32.768 kHz or
Table 25-3: Approximate Frame Frequency in Hz using internal RC osc @ 14 kHz
Multiplex Frame Frequency =
Static
LP3:LP0
LP3:LP0
1/2
1/3
1/4
2
3
4
5
6
7
0
1
2
3
Clock source / (128 * (LP3:LP0 + 1))
Clock source / (128 * (LP3:LP0 + 1))
Clock source / (96 * (LP3:LP0 + 1))
Clock source / (128 * (LP3:LP0 + 1))
Fosc @ 8 MHz
Static
Static
109
55
36
27
85
64
51
43
37
32
109
1/2
55
36
27
1/2
85
64
51
43
37
32
146
114
1/3
1/3
73
49
36
85
68
57
49
43
109
1/4
1/4
55
36
27
85
64
51
43
37
32
Section 25. LCD
Table 25-1
DS31025A-page 25-7
shows the
25