PIC18F2455-I/SP Microchip Technology Inc., PIC18F2455-I/SP Datasheet - Page 285

• Manufacturer Part Number: PIC18F2455-I/SP
• Description: Microcontroller; 24 KB Flash; 2048 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2455-I/SP

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 23
• Interface: I2C/SPI/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 24K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

21.4.3
FIGURE 21-5:
TABLE 21-6:
© 2006 Microchip Technology Inc.
1A
1
2
3
4
Note 1:
Param.
No.
OSC1
CLKO
F
T
T
TosL,
TosH
TosR,
TosF
Instruction cycle period (T
except PLL. All specified values are based on characterization data for that particular oscillator type under
standard operating conditions with the device executing code. Exceeding these specified limits may result
in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested
to operate at “min.” values with an external clock applied to the OSC1/CLKI pin. When an external clock
input is used, the “max.” cycle time limit is “DC” (no clock) for all devices.
TIMING DIAGRAMS AND SPECIFICATIONS
Symbol
OSC
CY
OSC
EXTERNAL CLOCK TIMING REQUIREMENTS
EXTERNAL CLOCK TIMING (ALL MODES EXCEPT PLL)
External CLKI Frequency
Oscillator Frequency
External CLKI Period
Oscillator Period
Instruction Cycle Time
External Clock in (OSC1)
High or Low Time
External Clock in (OSC1)
Rise or Fall Time
Q4
Characteristic
CY
(1)
Q1
) equals four times the input oscillator time base period for all configurations
1
(1)
(1)
Advance Information
(1)
(1)
Q2
20.8
20.8
83.3
Min
250
DC
0.1
25
30
10
—
—
4
4
2
3
10,000
Max
250
250
7.5
48
25
48
20
Q3
—
—
—
—
4
PIC18F2450/4450
3
Units
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
Q4
4
EC, ECIO Oscillator mode
XT, XTPLL Oscillator mode
HS Oscillator mode
HSPLL Oscillator mode
EC, ECIO Oscillator mode
XT Oscillator mode
HS Oscillator mode
HSPLL Oscillator mode
T
XT Oscillator mode
HS Oscillator mode
XT Oscillator mode
HS Oscillator mode
CY
= 4/F
4
OSC
Conditions
DS39760A-page 283
Q1