PIC16F1827-I/MV Microchip Technology Inc., PIC16F1827-I/MV Datasheet - Page 178

• Manufacturer Part Number: PIC16F1827-I/MV
• Description: 28 UQFN 4x4x0.5mm TUBE, 7 KB Flash, 384 bytes RAM, 32 MHz Int. Osc, 16 I/0, Enha
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F1827-I/MV

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 8 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 16
• Interface: CAN/I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin UQFN
• Programmable Memory: 7K Bytes
• Ram Size: 384 Bytes
• Speed: 32 MHz
• Timers: 4-8-bit, 1-16-bit
• Voltage, Range: 1.8-5.5 V
• Standby Current (pic16lf182x): 30 nA @ 1.8 V, Typical
• Lead Free Status / Rohs Status: RoHS Compliant part

PIC16(L)F1826/27
21.1
The Timer1 module is a 16-bit incrementing counter
which is accessed through the TMR1H:TMR1L register
pair. Writes to TMR1H or TMR1L directly update the
counter.
When used with an internal clock source, the module is
a timer and increments on every instruction cycle.
When used with an external clock source, the module
can be used as either a timer or counter and incre-
ments on every selected edge of the external source.
Timer1 is enabled by configuring the TMR1ON and
TMR1GE bits in the T1CON and T1GCON registers,
respectively.
selections.
TABLE 21-1:
TABLE 21-2:
DS41391D-page 178
TMR1CS1
TMR1ON
0
0
1
1
0
0
1
1
1
Timer1 Operation
Table 21-1
TIMER1 ENABLE
SELECTIONS
CLOCK SOURCE SELECTIONS
TMR1CS0
TMR1GE
displays the Timer1 enable
0
1
0
1
0
1
0
0
1
Off
Off
Always On
Count Enabled
Operation
T1OSCEN
Timer1
x
x
0
0
x
Instruction Clock (F
System Clock (F
External Clocking on T1CKI Pin
External Clocking on T1CKI Pin
Capacitive Sensing Oscillator
21.2
The TMR1CS<1:0> and T1OSCEN bits of the T1CON
register are used to select the clock source for Timer1.
Table 21-2
21.2.1
When the internal clock source is selected the
TMR1H:TMR1L register pair will increment on multiples
of F
When the F
Timer1 register value will increment by four counts every
instruction clock cycle. Due to this condition, a 2 LSB
error in resolution will occur when reading the Timer1
value. To utilize the full resolution of Timer1, an
asynchronous input signal must be used to gate the
Timer1 clock input.
The following asynchronous sources may be used:
• Asynchronous event on the T1G pin to Timer1
• C1 or C2 comparator input to Timer1 gate
21.2.2
When the external clock source is selected, the Timer1
module may work as a timer or a counter.
When enabled to count, Timer1 is incremented on the
rising edge of the external clock input T1CKI or the
capacitive sensing oscillator signal. Either of these
external clock sources can be synchronized to the
microcontroller
asynchronously.
When used as a timer with a clock oscillator, an
external 32.768 kHz crystal can be used in conjunction
with the dedicated internal oscillator circuit.
gate
Note:
OSC
as determined by the Timer1 prescaler.
OSC
Clock Source Selection
displays the clock source selections.
OSC
• Timer1 enabled after POR
• Write to TMR1H or TMR1L
• Timer1 is disabled
• Timer1 is disabled (TMR1ON = 0)
INTERNAL CLOCK SOURCE
EXTERNAL CLOCK SOURCE
In Counter mode, a falling edge must be
registered by the counter prior to the first
incrementing rising edge after any one or
more of the following conditions:
OSC
)
when T1CKI is high then Timer1 is
enabled (TMR1ON=1) when T1CKI is
low.
/4)
Clock Source
internal clock source is selected, the
system
 2011 Microchip Technology Inc.
clock
or
they
can
run