PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 29

• Manufacturer Part Number: PIC18F6621-I/PT
• Description: 64 PIN, 64 KB FLASH, 3840 RAM, 52 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F6621-I/PT

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 54
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 3.8K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

If the main oscillator is configured for HS mode with
PLL active, an oscillator start-up time (T
additional PLL time-out (T
out is typically 2 ms and allows the PLL to lock to the
main oscillator frequency. A timing diagram, indicating
the transition from the Timer1 oscillator to the main
oscillator for HS+PLL mode, is shown in Figure 2-10.
FIGURE 2-10:
If the main oscillator is configured for EC mode with PLL
active, only PLL time-out (T
out is typically 2 ms and allows the PLL to lock to the
main oscillator frequency. A timing diagram, indicating
the transition from the Timer1 oscillator to the main
oscillator for EC with PLL active, is shown in Figure 2-11.
FIGURE 2-11:
 2005 Microchip Technology Inc.
Note: T
Program Counter
Program Counter
Internal System
(OSCCON<0>)
Internal System
(OSCCON<0>)
PLL Clock
PLL Clock
OST
T1OSI
T1OSI
OSC1
OSC1
Clock
Clock
Input
Input
SCS
= 1024 T
SCS
OSC
Q4
PC
PC
Q4
(drawing not to scale).
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1
(HS WITH PLL ACTIVE, SCS1 = 1)
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1
(EC WITH PLL ACTIVE, SCS1 = 1)
PLL
PLL
Q1
Q1
) will occur. The PLL time-
T
) will occur. The PLL time-
OST
T
PLL
OST
T
PLL
PIC18F6525/6621/8525/8621
) plus an
PC + 2
T
PC + 2
T
OSC
OSC
1
1
2
2
3
3
T
T
SCS
T
T
4
SCS
4
T
T
1
1
P
P
5
5
6
6
7
7
Q1 Q2 Q3 Q4 Q1 Q2
Q1 Q2 Q3 Q4 Q1 Q2
8
8
DS39612B-page 27
PC + 4
PC + 4
Q3
Q3
Q4
Q4