PIC18LF2439-I/SO Microchip Technology, PIC18LF2439-I/SO Datasheet - Page 23

• Manufacturer Part Number: PIC18LF2439-I/SO
• Description: IC MCU FLASH 6KX16 EE A/D 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2439-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 12KB (6K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 640 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: 28-SOIC (7.5mm Width)
• Processor Series: PIC18LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 640 B
• Interface Type: I2C, SPI, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 16 bit
• Operating Supply Voltage: 2 V to 5.5 V
• 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: DV164005, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

FIGURE 2-5:
2.5
When the device executes a SLEEP instruction, the
oscillator is turned off and the device is held at the
beginning of an instruction cycle (Q1 state). With the
oscillator off, the OSC1 and OSC2 signals will stop
oscillating. Since all the transistor switching currents
have been removed, SLEEP mode achieves the lowest
current consumption of the device (only leakage cur-
rents). Enabling any on-chip feature that will operate
during SLEEP will increase the current consumed dur-
ing SLEEP. The user can wake from SLEEP through
external RESET, Watchdog Timer Reset, or through an
interrupt.
2.6
Power-up delays are controlled by two timers, so that
no external RESET circuitry is required for most appli-
cations. The delays ensure that the device is kept in
RESET, until the device power supply and clock are
stable. For additional information on RESET operation,
see Section 3.0.
TABLE 2-2:
 2002 Microchip Technology Inc.
ECIO
EC
HS
Note:
OSC Mode
(from Configuration
Effects of SLEEP Mode on the
On-Chip Oscillator
Power-up Delays
bit Register)
See Table 3-1 in the “Reset” section, for time-outs due to SLEEP and MCLR Reset.
OSC1
OSC2
OSC1 AND OSC2 PIN STATES IN SLEEP MODE
Feedback inverter disabled, at quiescent
PLL BLOCK DIAGRAM
PLL Enable
Crystal
Osc
HS Osc
voltage level
OSC1 Pin
Floating
Floating
F
F
IN
OUT
Comparator
Phase
Preliminary
Loop
Filter
The first timer is the Power-up Timer (PWRT), which
optionally provides a fixed delay of 72 ms (nominal) on
power-up only (POR and BOR). The second timer is
the Oscillator Start-up Timer (OST), intended to keep
the chip in RESET until the crystal oscillator is stable.
With the PLL enabled (HS/PLL Oscillator mode), the
time-out sequence following a Power-on Reset is differ-
ent from other Oscillator modes. The time-out
sequence is as follows:
1.
2.
3.
÷
4
The PWRT time-out is invoked after a POR time
delay has expired.
The Oscillator Start-up Timer (OST) is invoked.
However, this is still not a sufficient amount of
time to allow the PLL to lock at high frequencies.
The PWRT timer is used to provide an additional
fixed 2 ms (nominal) time-out to allow the PLL
ample time to lock to the incoming clock
frequency.
Feedback inverter disabled, at quiescent
Configured as PORTA, bit 6
VCO
PIC18FXX39
voltage level
At logic low
OSC2 Pin
DS30485A-page 21
SYSCLK