PIC18LF8490-I/PT Microchip Technology, PIC18LF8490-I/PT Datasheet - Page 146

• Manufacturer Part Number: PIC18LF8490-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF8490-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
• Number Of I /o: 66
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI, I2C, EUSART, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 66
• Number Of Timers: 1 x 8
• 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: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM163028
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC18F6390/6490/8390/8490
13.1
Timer3 can operate in one of three modes:
• Timer
• Synchronous counter
• Asynchronous counter
The operating mode is determined by the clock select
bit, TMR3CS (T3CON<1>). When TMR3CS is cleared
(= 0), Timer3 increments on every internal instruction
FIGURE 13-1:
FIGURE 13-2:
DS39629C-page 144
T1OSO/T13CKI
T1OSO/T13CKI
Note 1: When T1OSCEN is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
Note 1: When T1OSCEN is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
Timer3 Operation
T1OSI
T1OSI
Timer1 Oscillator
Timer1 Oscillator
T1OSCEN
T3CKPS1:T3CKPS0
T3SYNC
TMR3ON
TIMER3 BLOCK DIAGRAM
TIMER3 BLOCK DIAGRAM (16-BIT READ/WRITE MODE)
T1OSCEN
T3CKPS1:T3CKPS0
T3SYNC
TMR3ON
CCP Special Event Trigger
CCP Special Event Trigger
(1)
(1)
T3CCPx
T3CCPx
TMR3CS
TMR3CS
Clock
Internal
F
Clock
Internal
F
OSC
OSC
/4
/4
1
0
1
0
Timer1 Clock Input
Clear TMR3
Clear TMR3
Prescaler
1, 2, 4, 8
Prescaler
1, 2, 4, 8
cycle (F
on every rising edge of the Timer1 external clock input
or the Timer1 oscillator, if enabled.
As
RC0/T1OSO/T13CKI pins become inputs when the
Timer1 oscillator is enabled. This means the values of
TRISC<1:0> are ignored and the pins are read as ‘0’.
2
2
with
OSC
TMR3L
TMR3L
/4). When the bit is set, Timer3 increments
8
Timer1,
Sleep Input
Synchronize
Sleep Input
Synchronize
8
Detect
Detect
High Byte
High Byte
TMR3H
TMR3
TMR3
8
© 2007 Microchip Technology Inc.
8
the
8
1
0
1
0
Set
TMR3IF
on Overflow
Read TMR3L
Write TMR3L
Internal Data Bus
RC1/T1OSI
on Overflow
TMR3IF
Set
Timer3
On/Off
Timer3
On/Off
and