PIC18F85K22-I/PT Microchip Technology, PIC18F85K22-I/PT Datasheet - Page 204

• Manufacturer Part Number: PIC18F85K22-I/PT
• Description: IC, 8BIT MCU, PIC18F, 64MHZ, TQFP-80
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F85K22-I/PT

• Controller Family/series: PIC18
• No. Of I/o's: 69
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2KB
• Cpu Speed: 64MHz
• No. Of Timers: 8
• Core Size: 8 Bit
• Program Memory Size: 32KB
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: EBI/EMI, I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F87K22 FAMILY
FIGURE 14-4:
14.8.2
The Timer1 gate source can be selected from one of
four sources. Source selection is controlled by the
T1GSSx (T1GCON<1:0>) bits (see
TABLE 14-4:
The polarity for each available source is also selectable,
controlled by the T1GPOL bit (T1GCON<6>).
14.8.2.1
The T1G pin is one source for Timer1 gate control. It
can be used to supply an external source to the Timer1
gate circuitry.
14.8.2.2
The TMR2 register will increment until it matches the
value in the PR2 register. On the very next increment
cycle, TMR2 will be reset to 00h. When this Reset
DS39960D-page 204
T1GSS<1:0>
00
01
10
11
TMR1GE
T1GPOL
T1GVAL
T1G_IN
Timer1
T1CKI
TIMER1 GATE SOURCE
SELECTION
T1G Pin Gate Operation
Timer2 Match Gate Operation
Timer1 Gate Pin
TMR2 to Match PR2
(TMR2 increments to match PR2)
Comparator 1 Output
(comparator logic high output)
Comparator 2 Output
(comparator logic high output)
TIMER1 GATE SOURCES
TIMER1 GATE COUNT ENABLE MODE
Timer1 Gate Source
N
Table
14-4).
N + 1
occurs, a low-to-high pulse will automatically be gener-
ated and internally supplied to the Timer1 gate circuitry.
The pulse will remain high for one instruction cycle and
will return back to a low state until the next match.
The T1GPOL bit determines when the Timer1 counter
increments based on this pulse. When T1GPOL = 1,
Timer1 increments for a single instruction cycle follow-
ing a TMR2 match with PR2. When T1GPOL = 0,
Timer1 increments continuously, except for the cycle
following the match, when the gate signal goes from
low-to-high.
14.8.2.3
The output of Comparator 1 can be internally supplied
to the Timer1 gate circuitry. After setting up
Comparator 1 with the CM1CON register, Timer1 will
increment depending on the transitions of the
CMP1OUT (CMSTAT<5>) bit.
14.8.2.4
The output of Comparator 2 can be internally supplied
to the Timer1 gate circuitry. After setting up
Comparator 2 with the CM2CON register, Timer1 will
increment depending on the transitions of the
CMP2OUT (CMSTAT<6>) bit.
N + 2
Comparator 1 Output Gate
Operation
Comparator 2 Output Gate
Operation
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N + 3
N + 4