PIC18F25K22-I/SP Microchip Technology Inc., PIC18F25K22-I/SP Datasheet - Page 43

• Manufacturer Part Number: PIC18F25K22-I/SP
• Description: 32KB, Flash, 1536bytes-RAM, 8-bit Family, nanoWatt XLP, 28 SPDIP .300in TUBE
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F25K22-I/SP

• A/d Inputs: 17-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 16 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 24
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K Bytes
• Speed: 64 MHz
• Temperature Range: –40 to 125 °C
• Timers: 3-8-bit, 4-16-bit
• Voltage, Range: 1.8-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

2.10.2
1.
2.
3.
4.
5.
6.
FIGURE 2-9:
 2010 Microchip Technology Inc.
New Clk Ready
New Clk Ready
Low Speed
High Speed
System Clock
Wake-up from Power-on Reset or Sleep.
Instructions begin executing by the internal
oscillator at the frequency set in the IRCF<2:0>
bits of the OSCCON register.
OST enabled to count 1024 external clock
cycles.
OST timed out. External clock is ready.
OSTS is set.
Clock switch finishes according to
System Clock
IRCF <2:0>
Note 1: Start-up time includes T
IRCF <2:0>
New Clock
New Clock
Old Clock
Old Clock
TWO-SPEED START-UP
SEQUENCE
Select Old
High Speed
Low Speed
Select Old
CLOCK SWITCH TIMING
Start-up Time
Start-up Time
OST
(1024 T
Figure 2-9
(1)
Select New
Select New
(1)
OSC
) for external clocks, plus T
Preliminary
Clock Sync
2.10.3
Checking the state of the OSTS bit of the OSCCON
register will confirm if the microcontroller is running
from the external clock source, as defined by the
FOSC<2:0> bits in CONFIG1H Configuration register,
or the internal oscillator. OSTS = 0 when the external
oscillator is not ready, which indicates that the system
is running from the internal oscillator.
Clock Sync
PIC18(L)F2X/4XK22
PLL
CHECKING TWO-SPEED CLOCK
STATUS
(approx. 2 ms) for HSPLL mode.
Running
Running
DS41412D-page 43