PIC18F6490-E/PT Microchip Technology, PIC18F6490-E/PT Datasheet - Page 264
PIC18F6490-E/PT
Manufacturer Part Number
PIC18F6490-E/PT
Description
IC PIC MCU FLASH 16KX16 64TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F6310-IPT.pdf
(28 pages)
3.PIC18F6390-IPT.pdf
(414 pages)
4.PIC18F6390-IPT.pdf
(16 pages)
5.PIC18F6390-IPT.pdf
(12 pages)
6.PIC18F6390-IPT.pdf
(6 pages)
7.PIC18F6390-IPT.pdf
(4 pages)
Specifications of PIC18F6490-E/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
64-TFQFP
For Use With
DM163028 - BOARD DEMO PICDEM LCD
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F6490-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC18F6310-IPT PDF datasheet #2
- PIC18F6390-IPT PDF datasheet #3
- PIC18F6390-IPT PDF datasheet #4
- PIC18F6390-IPT PDF datasheet #5
- PIC18F6390-IPT PDF datasheet #6
- PIC18F6390-IPT PDF datasheet #7
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- Download datasheet (7Mb)
PIC18F6390/6490/8390/8490
22.2
The LCD driver module has 3 possible clock sources:
• (F
• T13CKI Clock/32
• INTRC/32
The first clock source is the system clock divided by
8192 ((F
provide about 1 kHz output when the system clock is
8 MHz. The divider is not programmable. Instead, the
LCD prescaler bits, LCDPS<3:0>, are used to set the
LCD frame clock rate.
The second clock source is the Timer1 oscillator/32.
This also gives about 1 kHz when a 32.768 kHz crystal
is used with the Timer1 oscillator. To use the Timer1
oscillator
(T1CON<3>) bit should be set.
FIGURE 22-2:
DS39629C-page 262
OSC
Crystal Oscillator
/4)/8192
System Clock
Nom F
OSC
TMR1 32 kHz
Internal RC Oscillator
LCD Clock Source Selection
(F
as
/4)/8192). This divider ratio is chosen to
OSC
RC
a
/4)
= 31.25 kHz
clock
LCD CLOCK GENERATION
source,
÷8192
÷32
÷32
(LCDCON<3:2>)
the
CS1:CS0
T1OSCEN
÷4
÷2
(LCDCON<1:0>)
LMUX1:LMUX0
QUAD
STAT
TRIP
DUP
The third clock source is a 31.25 kHz internal RC
oscillator/32, which provides approximately 1 kHz
output.
The second and third clock sources may be used to
continue running the LCD while the processor is in
Sleep.
Using the bits, CS1:CS0 (LCDCON<3:2>), any of these
clock sources can be selected.
22.2.1
A 16-bit counter is available as a prescaler for the LCD
clock. The prescaler is not directly readable or writable;
its value is set by the LP3:LP0 bits (LCDPS<3:0>), which
determine the prescaler assignment and prescale ratio.
The prescale values from 1:1 through 1:32768 in
power-of-2 increments are selectable.
4-Bit Prog Prescaler
LCD PRESCALER
(LCDPS<3:0>)
LP3:LP0
© 2007 Microchip Technology Inc.
(LCDCON<1:0>)
LMUX1:LMUX0
Ring Counter
÷1, 2, 3, 4
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