PIC18C452-I/L Microchip Technology, PIC18C452-I/L Datasheet - Page 23
![IC MCU OTP 16KX16 A/D 44PLCC](/photos/6/63/66325/150-44-plcc_sml.jpg)
PIC18C452-I/L
Manufacturer Part Number
PIC18C452-I/L
Description
IC MCU OTP 16KX16 A/D 44PLCC
Manufacturer
Microchip Technology
Series
PIC® 18Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16C770-ISO.pdf
(8 pages)
3.PIC18C242-ISO.pdf
(305 pages)
4.PIC18C242-ISO.pdf
(12 pages)
Specifications of PIC18C452-I/L
Core Size
8-Bit
Program Memory Size
32KB (16K x 16)
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Number Of I /o
33
Program Memory Type
OTP
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Controller Family/series
PIC18
No. Of I/o's
34
Ram Memory Size
1.5KB
Cpu Speed
40MHz
No. Of Timers
4
Package
44PLCC
Device Core
PIC
Family Name
PIC18
Maximum Speed
40 MHz
Operating Supply Voltage
5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
34
Interface Type
I2C/SPI/USART
On-chip Adc
8-chx10-bit
Number Of Timers
4
Processor Series
PIC18C
Core
PIC
Data Ram Size
1.5 KB
Maximum Clock Frequency
40 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
ICE2000, DM163022, DV164136
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3DB18C452 - BOARD DAUGHTER ICEPIC3AC164309 - MODULE SKT FOR PM3 44PLCC444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCCDV007003 - PROGRAMMER UNIVERSAL PROMATE II
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18C452-I/L
Manufacturer:
MICROCHIP
Quantity:
58
Company:
Part Number:
PIC18C452-I/L
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16C770-ISO PDF datasheet #2
- PIC18C242-ISO PDF datasheet #3
- PIC18C242-ISO PDF datasheet #4
- Current page: 23 of 305
- Download datasheet (6Mb)
2.6.2
The PIC18CXX2 devices contain circuitry to prevent
"glitches" when switching between oscillator sources.
Essentially, the circuitry waits for eight rising edges of
the clock source that the processor is switching to. This
ensures that the new clock source is stable and that it’s
pulse width will not be less than the shortest pulse
width of the two clock sources.
FIGURE 2-8:
The sequence of events that takes place when switch-
ing from the Timer1 oscillator to the main oscillator will
depend on the mode of the main oscillator. In addition
to eight clock cycles of the main oscillator, additional
delays may take place.
FIGURE 2-9:
Program Counter
2001 Microchip Technology Inc.
Note 1: T
Internal System
Note 1: Delay on internal system clock is eight oscillator cycles for synchronization.
(OSCCON<0>)
T1OSI
OSC1
Internal
System
Clock
SCS
(OSCCON<0>)
Program
Counter
T1OSI
OSC2
OSC1
Clock
SCS
OST
Q1
OSCILLATOR TRANSITIONS
= 1024T
T
Q2
OSC
PC
Q3
Q3
PC
OSC
Q4
TIMING DIAGRAM FOR TRANSITION FROM OSC1 TO TIMER1 OSCILLATOR
TIMING FOR TRANSITION BETWEEN TIMER1 AND OSC1 (HS, XT, LP)
(drawing not to scale).
Q4
Q1
T
DLY
1
Q1
2
T
T
1
P
3
T
OST
4
Tscs
PC + 2
5
T
OSC
6
PC + 2
7
A timing diagram indicating the transition from the main
oscillator to the Timer1 oscillator is shown in
Figure 2-8. The Timer1 oscillator is assumed to be run-
ning all the time. After the SCS bit is set, the processor
is frozen at the next occurring Q1 cycle. After eight syn-
chronization cycles are counted from the Timer1 oscil-
lator, operation resumes. No additional delays are
required after the synchronization cycles.
If the main oscillator is configured for an external crys-
tal (HS, XT, LP), then the transition will take place after
an oscillator start-up time (T
diagram indicating the transition from the Timer1 oscil-
lator to the main oscillator for HS, XT and LP modes is
shown in Figure 2-9.
1
8
2
Q1
3
Q2
4
T
T
T
SCS
1
Q3
P
5
6
Q4
7
PIC18CXX2
OST
Q1
Q1
8
) has occurred. A timing
Q2 Q3
Q2
PC + 4
DS39026C-page 21
Q3
Q4
Q1 Q2
Q4
PC + 6
Q1
Q3
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