PIC18F27J53T-I/SO Microchip Technology, PIC18F27J53T-I/SO Datasheet - Page 227

• Manufacturer Part Number: PIC18F27J53T-I/SO
• Description: 28-pin, USB, 128KB Flash, 4KB RAM, 12 MIPS, 12-bit ADC, NanoWatt XLP 28 SOIC .30
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F27J53T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2.15 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.8 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 8
• Operating Supply Voltage: 2.15 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

15.5.2
The Timer3/5 gate source can be selected from one of
four different sources. Source selection is controlled by
the TxGSS<1:0> bits (TxGCON<1:0>). The polarity for
each available source is also selectable and is
controlled by the TxGPOL bit (TxGCON<6>).
TABLE 15-2:
15.5.2.1
The TxG pin is one source for Timer3/5 gate control. It
can be used to supply an external source to the gate
circuitry.
FIGURE 15-3:
 2010 Microchip Technology Inc.
TxGSS<1:0>
TMRxGE
TxGPOL
Timer3/5
TxGVAL
TxG_IN
TxGTM
TxCKI
00
01
10
11
TIMER3/5 GATE SOURCE
SELECTION
TxG Pin Gate Operation
TxG timer gate pin
TMR4/6 matches PR4/6
Comparator 1 output
Comparator 2 output
TIMER3/5 GATE SOURCES
N
TIMER3/5 GATE TOGGLE MODE
Timerx Gate Source
N + 1 N + 2 N + 3
Preliminary
PIC18F47J53 FAMILY
15.5.2.2
The TMR4/6 register will increment until it matches the
value in the PR4/6 register. On the very next increment
cycle, TMR4/6 will be reset to 00h. When this Reset
occurs, a low-to-high pulse will automatically be
generated and internally supplied to the Timer3/5 gate
circuitry.
15.5.3
When Timer3/5 Gate Toggle mode is enabled, it is
possible to measure the full cycle length of a Timer3/5
gate signal, as opposed to the duration of a single level
pulse.
The Timer1 gate source is routed through a flip-flop that
changes state on every incrementing edge of the
signal. (For timing details, see Figure 15-3.)
The TxGVAL bit will indicate when the Toggled mode is
active and the timer is counting.
Timer3/5 Gate Toggle mode is enabled by setting the
TxGTM bit (TxGCON<5>). When the TxGTM bit is
cleared, the flip-flop is cleared and held clear. This is
necessary in order to control which edge is measured.
N + 4
TIMER3/5 GATE-TOGGLE MODE
Timer4/6 Match Gate Operation
N + 5 N + 6 N + 7
DS39964B-page 227
N + 8