PIC18F458-I/PTG Microchip Technology, PIC18F458-I/PTG Datasheet - Page 122
PIC18F458-I/PTG
Manufacturer Part Number
PIC18F458-I/PTG
Description
IC MCU FLASH 16KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18LF242-ISO.pdf
(36 pages)
3.PIC18F248-ISO.pdf
(402 pages)
4.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18F458-I/PTG
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC18LF242-ISO PDF datasheet #2
- PIC18F248-ISO PDF datasheet #3
- PIC18F248-ISO PDF datasheet #4
- Current page: 122 of 402
- Download datasheet (7Mb)
14.1
Timer3 can operate in one of these modes:
• As a timer
• As a synchronous counter
• As an asynchronous counter
The operating mode is determined by the clock select
bit, TMR3CS (T3CON register).
FIGURE 14-1:
FIGURE 14-2:
DS41159E-page 120
PIC18FXX8
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This eliminates power drain.
Note 1: When the T1OSCEN bit is cleared, the inverter and feedback resistor are turned off. This eliminates power drain.
TMR3IF Overflow
Interrupt Flag
bit
T1OSO/
T1OSI
T1CKI
Timer3 Operation
Data Bus<7:0>
T1OSO/
Write TMR3L
Read TMR3L
T1OSI
T1CKI
TMR3IF
Overflow
Interrupt
Flag bit
TIMER3 BLOCK DIAGRAM
TIMER3 BLOCK DIAGRAM CONFIGURED IN 16-BIT READ/WRITE MODE
T1OSC
8
TMR3H
TMR3H
T1OSC
TMR3H
8
To Timer1 Clock Input
Enable
Oscillator
T1OSCEN
8
TMR3
TMR3L
Oscillator
Enable
T1OSCEN
(1)
8
TMR3L
CLR
(1)
Clock
Internal
F
CLR
OSC
/4
TMR3ON
On/Off
Clock
Internal
F
OSC
TMR3CS
When TMR3CS = 0, Timer3 increments every instruc-
tion cycle. When TMR3CS = 1, Timer3 increments on
every rising edge of the Timer1 external clock input or
the Timer1 oscillator, if enabled.
When the Timer1 oscillator is enabled (T1OSCEN is set),
the RC1/T1OSI and RC0/T1OSO/T1CKI pins become
inputs. That is, the TRISC<1:0> value is ignored.
Timer3 also has an internal “Reset input”. This Reset
can be generated by the CCP module (Section 15.1
“CCP1 Module”).
1
0
/4
TMR3ON
T3CCPx
CCP Special Trigger
On/Off
TMR3CS
T3CKPS1:T3CKPS0
1
0
T3SYNC
T3CCPx
Prescaler
CCP Special Trigger
1, 2, 4, 8
T3CKPS1:T3CKPS0
0
1
T3SYNC
2
Prescaler
1, 2, 4, 8
0
1
© 2006 Microchip Technology Inc.
2
Synchronized
Clock Input
Synchronize
Sleep Input
Synchronized
det
Clock Input
Synchronize
Sleep Input
det
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