PIC18F8722-I/PT Microchip Technology Inc., PIC18F8722-I/PT Datasheet - Page 42
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PIC18F8722-I/PT
Manufacturer Part Number
PIC18F8722-I/PT
Description
80 PIN, 128 KB FLASH, 4K RAM, 70 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F8722-IPT.pdf
(448 pages)
Specifications of PIC18F8722-I/PT
A/d Inputs
16-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
1024 Bytes
Input Output
70
Interface
SPI/I2C/USART
Memory Type
Flash
Number Of Bits
8
Package Type
80-pin TQFP
Programmable Memory
128K Bytes
Ram Size
3.9K Bytes
Speed
40 MHz
Timers
2-8 bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC18F8722 FAMILY
2.8
When PRI_IDLE mode is selected, the configured
oscillator continues to run without interruption. For all
other power-managed modes, the oscillator using the
OSC1 pin is disabled. The OSC1 pin (and OSC2 pin in
crystal oscillator modes) will stop oscillating.
In
SEC_IDLE), the Timer1 oscillator is operating and
providing the device clock. The Timer1 oscillator may
also run in all power-managed modes if required to
clock Timer1 or Timer3.
In internal oscillator modes (RC_RUN and RC_IDLE),
the internal oscillator block provides the device clock
source. The 31 kHz INTRC output can be used directly
to provide the clock and may be enabled to support
various special features, regardless of the power-
managed mode (see Section 25.2 “Watchdog Timer
(WDT)” and Section 25.4 “Fail-Safe Clock Monitor”
for more information). The INTOSC output at 8 MHz
may be used directly to clock the device or may be
divided down by the postscaler. The INTOSC output is
disabled if the clock is provided directly from the INTRC
output. The INTOSC output is also enabled for Two-
Speed Start-up at 1 MHz after Resets and when
configured for wake from Sleep mode.
If the Sleep mode is selected, all clock sources are
stopped. Since all the transistor switching currents
have been stopped, Sleep mode achieves the lowest
current consumption of the device (only leakage
currents).
Enabling any on-chip feature that will operate during
Sleep will increase the current consumed during Sleep.
The INTRC is required to support WDT operation. The
Timer1 oscillator may be operating to support a real-
time clock. Other features may be operating that do not
require a device clock source (i.e., SSP slave, PSP,
INTn pins and others). Peripherals that may add
significant
Section 28.2 “DC Characteristics”.
TABLE 2-3:
DS39646B-page 40
RC, INTIO1
RCIO
INTIO2
ECIO
EC
LP, XT and HS
Note:
secondary
OSC Mode
Effects of Power-Managed Modes
on the Various Clock Sources
See Table 4-2 in Section 4.0 “Reset” for time-outs due to Sleep and MCLR Reset.
current
clock
OSC1 AND OSC2 PIN STATES IN SLEEP MODE
consumption
modes
Floating, external resistor pulls high
Floating, external resistor pulls high
Configured as PORTA, bit 7
Floating, driven by external clock
Floating, driven by external clock
Feedback inverter disabled at quiescent
voltage level
(SEC_RUN
are
listed
OSC1 Pin
and
Preliminary
in
2.9
Power-up delays are controlled by two or three timers,
so that no external Reset circuitry is required for most
applications. The delays ensure that the device is kept
in Reset until the device power supply is stable under
normal circumstances and the primary clock is operat-
ing and stable. For additional information on power-up
delays, see Section 4.5 “Device Reset Timers”.
The first timer is the Power-up Timer (PWRT) which
provides a fixed delay on power-up (parameter 33,
Table 28-12). It is enabled by clearing (= 0) the
PWRTEN configuration bit (CONFIG2L<0>).
2.9.1
The second timer is the Oscillator Start-up Timer
(OST), intended to delay execution until the crystal
oscillator is stable (LP, XT and HS modes). The OST
does this by counting 1024 oscillator cycles before
allowing the oscillator to clock the device.
When the HSPLL Oscillator mode is selected, a third
timer delays execution for an additional 2 ms following
the HS mode OST delay, so the PLL can lock to the
incoming clock frequency. At the end of these delays,
the OSTS bit (OSCCON<3>) is set.
There is a delay of interval T
Table 28-12), once execution is allowed to start, when
the controller becomes ready to execute instructions.
This delay runs concurrently with any other delays.
This may be the only delay that occurs when any of the
EC, RC or INTIO modes are used as the primary clock
source.
Power-up Delays
Configured as PORTA, bit 6
Configured as PORTA, bit 6
Configured as PORTA, bit 6
Feedback inverter disabled at quiescent
voltage level
At logic low (clock/4 output)
At logic low (clock/4 output)
DELAYS FOR POWER-UP AND
RETURN TO PRIMARY CLOCK
2004 Microchip Technology Inc.
OSC2 Pin
CSD
(parameter 38,
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