PIC18F4220-I/P Microchip Technology Inc., PIC18F4220-I/P Datasheet - Page 35
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PIC18F4220-I/P
Manufacturer Part Number
PIC18F4220-I/P
Description
Microcontroller; 4 KB Flash; 512 RAM; 256 EEPROM; 36 I/O; 40-Pin-PDIP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F4220-IP.pdf
(388 pages)
Specifications of PIC18F4220-I/P
A/d Inputs
13-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
I2C/SPI/UART/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
4K Bytes
Ram Size
512 Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F4220-I/PT
Manufacturer:
SST
Quantity:
1 150
Company:
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PIC18F4220-I/PT
Manufacturer:
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3.3.1
This mode is unique among the three Low-Power Idle
modes in that it does not disable the primary system
clock. For timing sensitive applications, this allows for
the fastest resumption of device operation, with its
more accurate primary clock source, since the clock
source does not have to “warm up” or transition from
another oscillator.
PRI_IDLE mode is entered by setting the IDLEN bit,
clearing the SCS bits and executing a SLEEP instruc-
tion. Although the CPU is disabled, the peripherals
continue to be clocked from the primary clock source
specified in Configuration Register 1H. The OSTS bit
remains set in PRI_IDLE mode (see Figure 3-3).
FIGURE 3-3:
FIGURE 3-4:
2003 Microchip Technology Inc.
CPU Clock
Peripheral
CPU Clock
Program
Peripheral
Counter
Program
Counter
OSC1
Clock
OSC1
Clock
PRI_IDLE MODE
Q1
TRANSITION TIMING TO PRI_IDLE MODE
TRANSITION TIMING FOR WAKE FROM PRI_IDLE MODE
Wake-up Event
Q2
PC
PC
CPU Start-up Delay
Q3
Q4
PIC18F2220/2320/4220/4320
Q1
PC + 2
When a wake-up event occurs, the CPU is clocked
from the primary clock source. A delay of approxi-
mately 10 s is required between the wake-up event
and when code execution starts. This is required to
allow the CPU to become ready to execute instructions.
After the wake-up, the OSTS bit remains set. The
IDLEN and SCS bits are not affected by the wake-up
(see Figure 3-4).
Q1
Q2
PC + 2
Q3
DS39599C-page 33
Q4
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