PIC16LF648A-I/ML Microchip Technology, PIC16LF648A-I/ML Datasheet - Page 54
PIC16LF648A-I/ML
Manufacturer Part Number
PIC16LF648A-I/ML
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LLCC,28PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Specifications of PIC16LF648A-I/ML
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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PIC16F627A/628A/648A
8.0
Timer2 is an 8-bit timer with a prescaler and a
postscaler. It can be used as the PWM time base for
PWM mode of the CCP module. The TMR2 register is
readable and writable, and is cleared on any device
Reset.
The input clock (F
1:4 or 1:16, selected by control bits T2CKPS<1:0>
(T2CON<1:0>).
The Timer2 module has an 8-bit period register PR2.
The TMR2 register value increments from 00h until it
matches the PR2 register value and then resets to 00h
on the next increment cycle. The PR2 register is a
readable and writable register. The PR2 register is
initialized to FFh upon Reset.
The match output of Timer2 goes through a 4-bit
postscaler (which gives a 1:1 to 1:16 scaling inclusive)
to generate a Timer2 interrupt (latched in flag bit
TMR2IF, (PIR1<1>)).
Timer2 can be shut off by clearing control bit TMR2ON
(T2CON<2>) to minimize power consumption.
Register 8-1 shows the Timer2 control register.
DS40044G-page 54
TIMER2 MODULE
OSC
/4) has a prescale option of 1:1,
8.1
The prescaler and postscaler counters are cleared
when any of the following occurs:
• a write to the TMR2 register
• a write to the T2CON register
• any device Reset (Power-on Reset, MCLR Reset,
The TMR2 register is not cleared when T2CON is
written.
8.2
The TMR2 output (before the postscaler) is fed to the
Synchronous Serial Port module which optionally uses
it to generate shift clock.
FIGURE 8-1:
Watchdog Timer Reset or Brown-out Reset)
Sets flag
bit TMR2IF
TOUTPS<3:0>
Postscaler
1:1
Timer2 Prescaler and Postscaler
TMR2 Output
to
1:16
4
TMR2
output
Reset
EQ
Comparator
TMR2 Reg
TIMER2 BLOCK DIAGRAM
PR2 Reg
© 2009 Microchip Technology Inc.
1:1, 1:4, 1:16
T2CKPS<1:0>
Prescaler
2
F
OSC
/4
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