PIC18F4539T-E/ML Microchip Technology, PIC18F4539T-E/ML Datasheet - Page 111

• 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

13.0
The Timer3 module timer/counter has the following
features:
• 16-bit timer/counter
• Readable and writable (both registers)
• Internal or external clock select
• Interrupt-on-overflow from FFFFh to 0000h
REGISTER 13-1:
 2002 Microchip Technology Inc.
(two 8-bit registers: TMR3H and TMR3L)
TIMER3 MODULE
bit 7
bit 6, 3
bit 5, 4
bit 2
bit 1
bit 0
T3CON: TIMER3 CONTROL REGISTER
bit 7
RD16: 16-bit Read/Write Mode Enable bit
1 = Enables register read/write of Timer3 in one 16-bit operation
0 = Enables register read/write of Timer3 in two 8-bit operations
Unimplemented: Maintain as ‘0’
T3CKPS1:T3CKPS0: Timer3 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
T3SYNC: Timer3 External Clock Input Synchronization Control bit
(Not usable if the system clock comes from Timer1/Timer3)
When TMR3CS = 1:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
When TMR3CS = 0:
This bit is ignored. Timer3 uses the internal clock when TMR3CS = 0.
TMR3CS: Timer3 Clock Source Select bit
1 = External clock input from T13CKI
0 = Internal clock (F
TMR3ON: Timer3 On bit
1 = Enables Timer3
0 = Stops Timer3
Legend:
R = Readable bit
- n = Value at POR
R/W-0
RD16
(on the rising edge after the first falling edge)
R/W-0
—
OSC
T3CKPS1 T3CKPS0
/4)
R/W-0
Preliminary
W = Writable bit
‘1’ = Bit is set
R/W-0
Figure 13-1 is a simplified block diagram of the Timer3
module.
Register 13-1 shows the Timer1 control register, which
sets the Operating mode of the Timer1 module.
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
—
T3SYNC
R/W-0
PIC18FXX39
TMR3CS
x = Bit is unknown
R/W-0
DS30485A-page 109
TMR3ON
R/W-0
bit 0