PIC18F8620-E/PT Microchip Technology, PIC18F8620-E/PT Datasheet - Page 26

• Manufacturer Part Number: PIC18F8620-E/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8620-E/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.75K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3840 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 68
• Number Of Timers: 2 x 8 bit
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM183022, DM183032
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / Rohs Status: Details

PIC18F6520/8520/6620/8620/6720/8720
2.6
The PIC18FXX20 devices include a feature that allows
the system clock source to be switched from the main
oscillator to an alternate low-frequency clock source.
For the PIC18FXX20 devices, this alternate clock
source is the Timer1 oscillator. If a low-frequency
crystal (32 kHz, for example) has been attached to the
Timer1 oscillator pins and the Timer1 oscillator has
been enabled, the device can switch to a low-power
FIGURE 2-7:
DS39609B-page 24
Oscillator Switching Feature
OSC2
OSC1
T1OSO
T1OSI
DEVICE CLOCK SOURCES
Timer1 Oscillator
Main Oscillator
PIC18FXX20
T1OSCEN
Enable
Oscillator
Sleep
Clock Source Option
for other Modules
4 x PLL
execution mode. Figure 2-7 shows a block diagram of
the system clock sources. The clock switching feature
is enabled by programming the Oscillator Switching
Enable (OSCSEN) bit in Configuration Register 1H to a
‘0’. Clock switching is disabled in an erased device.
See Section 12.0 “Timer1 Module” for further details
of the Timer1 oscillator. See Section 23.0 “Special
Features of the CPU” for Configuration register
details.
T
T
T
OSC
1
P
T
OSC
/4
Source
Clock
 2004 Microchip Technology Inc.
T
SCLK