PIC18F4539T-E/ML Microchip Technology, PIC18F4539T-E/ML Datasheet - Page 109

• Manufacturer Part Number: PIC18F4539T-E/ML
• Description: IC PIC MCU FLASH 12KX16 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4539T-E/ML

• 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: 32
• 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): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-QFN
• 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: 32
• Number Of Timers: 16 bit
• Operating Supply Voltage: 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: DV164005, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.0
The Timer2 module is an 8-bit timer with a selectable
8-bit period. It has the following features:
• Input from system clock at F
• Interrupt on timer-to-period match with
The module has three registers: the TMR2 counter, the
PR2 period register, and the T2CON control register.
The general operation of Timer2 is shown in
Figure 12-1.
Additional information on the use of Timer2 as a
time-base is available in Section 15.0 (PWM Modules).
FIGURE 12-1:
 2002 Microchip Technology Inc.
programmable input prescaler
programmable postscaler
TIMER2 MODULE
F
OSC
/4
TIMER2 BLOCK DIAGRAM
(ProMPT Module)
1:1, 1:4, 1:16
Prescaler
OSC
/4 with
Comparator
Preliminary
TMR2
PR2
(TMR2 = PR2)
RESET
Note:
(ProMPT Module)
In PIC18FXX39 devices, Timer2 is used
exclusively as a time-base for the PWM
modules in motor control applications. As
such, it is not available to users as a
resource. Although their locations are
shown on the device data memory maps,
none of the Timer2 registers are directly
accessible. Users should not alter the
values of these registers.
Postscaler
1:1 to 1:16
PIC18FXX39
bit TMR2IF
Output
DS30485A-page 107
TMR2
Sets Flag