PIC18LF2539T-I/SO Microchip Technology, PIC18LF2539T-I/SO Datasheet - Page 112

• Manufacturer Part Number: PIC18LF2539T-I/SO
• Description: IC MCU FLASH 12KX16 EE AD 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2539T-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: 24KB (12K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1408 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: 1408 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: Lead free / RoHS Compliant

PIC18FXX39
13.1
Timer3 can operate in one of these modes:
• As a timer
• As a synchronous counter
• As an asynchronous counter
FIGURE 13-1:
FIGURE 13-2:
DS30485A-page 110
Set TMR3IF Flag bit
on Overflow
T13CKI
Timer3 Operation
Data Bus<7:0>
Write TMR3L
Read TMR3L
T13CKI
TMR3IF
Overflow
Interrupt
Flag bit
TIMER3 BLOCK DIAGRAM
TIMER3 BLOCK DIAGRAM CONFIGURED IN 16-BIT READ/WRITE MODE
8
TMR3H
High Byte
TMR3H
Timer3
8
To Timer1 Clock Input
8
TMR3
TMR3L
8
TMR3L
Preliminary
Internal
Clock
F
OSC
/4
TMR3ON
On/Off
F
Internal
Clock
TMR3CS
OSC
The Operating mode is determined by the clock select
bit, TMR3CS (T3CON<1>). When TMR3CS = 0,
Timer3 increments every instruction cycle. When
TMR3CS = 1, Timer3 increments on every rising edge
of the Timer1 external clock input.
1
0
/4
TMR3ON
On/Off
T3CKPS1:T3CKPS0
TMR3CS
1
0
T3SYNC
Prescaler
1, 2, 4, 8
T3CKPS1:T3CKPS0
0
1
2
T3SYNC
Prescaler
1, 2, 4, 8
0
1
 2002 Microchip Technology Inc.
2
Synchronized
Clock Input
Synchronize
SLEEP Input
det
Synchronized
Synchronize
Clock Input
SLEEP Input
det