PIC18F2550-I/SP Microchip Technology Inc., PIC18F2550-I/SP Datasheet - Page 385

• Manufacturer Part Number: PIC18F2550-I/SP
• Description: Microcontroller; 32 KB Flash; 2048 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2550-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: 32K 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

FIGURE 28-7:
FIGURE 28-8:
TABLE 28-12: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
© 2006 Microchip Technology Inc.
30
31
32
33
34
35
36
37
38
39
Legend: TBD = To Be Determined
Param.
No.
Reference Voltage
Internal Reference
Watchdog
Note:
Oscillator
Time-out
Time-out
I/O pins
Enable Internal
Internal
Internal
Voltage Stable
PWRT
MCLR
Reset
Reset
Timer
POR
Symbol
TmcL
T
T
T
T
T
T
T
T
T
V
OST
CSD
WDT
IOZ
IRVST
IOBST
PWRT
BOR
LVD
DD
Refer to Figure 28-4 for load conditions.
V
IRVST
V
DD
AND BROWN-OUT RESET REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(no postscaler)
Oscillator Start-up Timer Period
Power-up Timer Period
I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
Brown-out Reset Pulse Width
Time for Internal Reference
Voltage to become Stable
Low-Voltage Detect Pulse Width
CPU Start-up Time
Time for INTOSC to Stabilize
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
BROWN-OUT RESET TIMING
33
Characteristic
32
PIC18F2455/2550/4455/4550
36
BV
Preliminary
DD
1024 T
Min
200
200
—
—
—
—
—
2
5
OSC
34
4.00
65.5
Typ
30
20
—
—
—
—
—
2
1
35
1024 T
TBD
TBD
Max
50
10
—
—
—
—
—
OSC
31
Units
ms
ms
ms
—
s
s
s
s
s
s
T
V
V
OSC
DD
DD
DS39632C-page 383
34
= OSC1 period
Conditions
B
V
VDD
LVD
V
BGAP
(see D005)
= 1.2V