PIC16LF819T-I/SO Microchip Technology, PIC16LF819T-I/SO Datasheet - Page 207
![IC MCU FLASH 2KX14 EEPROM 18SOIC](/photos/6/76/67656/150-18-soic_sml.jpg)
PIC16LF819T-I/SO
Manufacturer Part Number
PIC16LF819T-I/SO
Description
IC MCU FLASH 2KX14 EEPROM 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16LF627A-IP.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC16F818-ISO.pdf
(8 pages)
4.PIC16F818-ISO.pdf
(8 pages)
5.PIC18F2450-ISO.pdf
(324 pages)
Specifications of PIC16LF819T-I/SO
Core Processor
PIC
Core Size
8-Bit
Speed
10MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
18-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16LF819T-I/SO
Manufacturer:
MITSUBISHI
Quantity:
330
Part Number:
PIC16LF819T-I/SO
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC16LF627A-IP PDF datasheet
- PIC16F818-ISO PDF datasheet #2
- PIC16F818-ISO PDF datasheet #3
- PIC16F818-ISO PDF datasheet #4
- PIC18F2450-ISO PDF datasheet #5
- Current page: 207 of 324
- Download datasheet (6Mb)
18.3
The Two-Speed Start-up feature helps to minimize the
latency period, from oscillator start-up to code
execution, by allowing the microcontroller to use the
INTRC oscillator as a clock source until the primary
clock source is available. It is enabled by setting the
IESO Configuration bit.
Two-Speed Start-up should be enabled only if the
primary oscillator mode is XT, HS, XTPLL or HSPLL
(Crystal-Based modes). Other sources do not require an
Oscillator Start-up Timer delay; for these, Two-Speed
Start-up should be disabled.
When enabled, Resets and wake-ups from Sleep mode
cause the device to configure itself to run from the
internal oscillator as the clock source, following the
time-out of the Power-up Timer after a Power-on Reset
is enabled. This allows almost immediate code
execution while the primary oscillator starts and the
OST is running. Once the OST times out, the device
automatically switches to PRI_RUN mode.
Because the OSCCON register is cleared on Reset
events, the INTRC clock is used directly at its base
frequency.
FIGURE 18-2:
© 2008 Microchip Technology Inc.
Two-Speed Start-up
Note 1:
CPU Clock
Peripheral
PLL Clock
Program
Counter
INTRC
Output
OSC1
Clock
T
Wake from Interrupt Event
OST
TIMING TRANSITION FOR TWO-SPEED START-UP (INTRC TO HSPLL)
= 1024 T
PC
OSC
; T
Q1
PLL
T
OST
= 2 ms (approx). These intervals are not shown to scale.
(1)
Q2
PC + 2
T
PLL
OSTS bit Set
Q3
(1)
Q4
In all other power-managed modes, Two-Speed Start-up
is not used. The device will be clocked by the currently
selected clock source until the primary clock source
becomes available. The setting of the IESO bit is
ignored.
18.3.1
While using the INTRC oscillator in Two-Speed Start-up,
the device still obeys the normal command sequences
for entering power-managed modes, including serial
SLEEP instructions (refer to Section 3.1.4 “Multiple
Sleep Commands”). In practice, this means that user
code can change the SCS1:SCS0 bit settings or issue
SLEEP instructions before the OST times out. This would
allow an application to briefly wake-up, perform routine
“housekeeping” tasks and return to Sleep before the
device starts to operate from the primary oscillator.
User code can also check if the primary clock source is
currently providing the device clocking by checking the
status of the OSTS bit (OSCCON<3>). If the bit is set,
the primary oscillator is providing the clock. Otherwise,
the internal oscillator is providing the clock during
wake-up from Reset or Sleep mode.
Q1
1
Transition
2
Clock
PIC18F2450/4450
n-1 n
SPECIAL CONSIDERATIONS FOR
USING TWO-SPEED START-UP
PC + 4
Q2
Q3 Q4
Q1
PC + 6
DS39760D-page 205
Q2
Q3
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