PIC18F6490-E/PT Microchip Technology, PIC18F6490-E/PT Datasheet - Page 45

• Manufacturer Part Number: PIC18F6490-E/PT
• Description: IC PIC MCU FLASH 16KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

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: -

FIGURE 3-1:
FIGURE 3-2:
© 2007 Microchip Technology Inc.
T1OSI
OSC1
CPU
Clock
Peripheral
Clock
Program
Counter
Note 1: T
CPU Clock
PLL Clock
Peripheral
Program
Counter
Output
T1OSI
OSC1
Clock
Q1
SCS1:SCS0 bits Changed
OST
Q2
TRANSITION TIMING FOR ENTRY TO SEC_RUN MODE
TRANSITION TIMING FROM SEC_RUN MODE TO PRI_RUN MODE (HSPLL)
= 1024 T
PC
Q3
Q4
OSC
Q1
; T
Q1
PLL
1
T
OST (1)
= 2 ms (approx). These intervals are not shown to scale.
PC
2
Q2
Clock Transition
PIC18F6390/6490/8390/8490
3
T
OSTS bit Set
Q3
PLL (1)
PC + 2
Q4
n-1
n
Q1
1
Transition
2
Clock
n-1
Q2
n
PC + 2
Q3
Q2
Q4
Q3 Q4
Q1
Q1
PC + 4
Q2
PC + 4
Q2
DS39629C-page 43
Q3
Q3