PIC18F2539-I/SP Microchip Technology, PIC18F2539-I/SP Datasheet - Page 106

• Manufacturer Part Number: PIC18F2539-I/SP
• Description: IC MCU FLASH 12KX16 EE A/D 28DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2539-I/SP

• Core Size: 8-Bit
• Program Memory Size: 24KB (12K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1408 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Controller Family/series: PIC18
• No. Of I/o's: 21
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 1.375KB
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Processor Series: PIC18F
• 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: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 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: 10 bit, 5 Channel
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: DVA18XP280 - DEVICE ADAPTER 18F2220 PDIP 28LD
• Lead Free Status / Rohs Status: Details

PIC18FXX39
11.1
Timer1 can operate in one of these modes:
• As a timer
• As a synchronous counter
• As an asynchronous counter
FIGURE 11-1:
FIGURE 11-2:
DS30485A-page 104
TMR1IF
Overflow
Interrupt
Flag bit
T13CKI
Timer1 Operation
Data Bus<7:0>
Write TMR1L
Read TMR1L
TMR1IF
Overflow
Interrupt
Flag bit
T13CKI
TIMER1 BLOCK DIAGRAM
TIMER1 BLOCK DIAGRAM: 16-BIT READ/WRITE MODE
8
High Byte
TMR1H
Timer 1
8
TMR1H
8
TMR1
TMR1
TMR1L
TMR1L
8
Clock
Internal
F
OSC
Clock
F
Internal
Preliminary
OSC
/4
/4
TMR1CS
TMR1ON
1
0
TMR1CS
On/Off
1
0
TMR1ON
on/off
The Operating mode is determined by the clock select
bit, TMR1CS (T1CON<1>). When TMR1CS = 0,
Timer1 increments every instruction cycle. When
TMR1CS = 1, Timer1 increments on every rising edge
of the external clock input.
T1CKPS1:T1CKPS0
Prescaler
1, 2, 4, 8
T1CKPS1:T1CKPS0
T1SYNC
T1SYNC
Prescaler
1, 2, 4, 8
2
0
1
1
0
2
 2002 Microchip Technology Inc.
Synchronized
Clock Input
Synchronize
SLEEP Input
Synchronized
Clock Input
Synchronize
SLEEP Input
det
det