PIC18F25K22-I/SP Microchip Technology Inc., PIC18F25K22-I/SP Datasheet - Page 191

• Manufacturer Part Number: PIC18F25K22-I/SP
• Description: 32KB, Flash, 1536bytes-RAM, 8-bit Family, nanoWatt XLP, 28 SPDIP .300in TUBE
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F25K22-I/SP

• A/d Inputs: 17-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 16 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 24
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K Bytes
• Speed: 64 MHz
• Temperature Range: –40 to 125 °C
• Timers: 3-8-bit, 4-16-bit
• Voltage, Range: 1.8-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

14.4.1
In Half-Bridge mode, two pins are used as outputs to
drive push-pull loads. The PWM output signal is output
on the CCPx/PxA pin, while the complementary PWM
output signal is output on the PxB pin (see
This mode can be used for Half-Bridge applications, as
shown in
where four power switches are being modulated with
two PWM signals.
In Half-Bridge mode, the programmable dead-band delay
can be used to prevent shoot-through current in Half-
Bridge power devices. The value of the PDC<6:0> bits of
the PWMxCON register sets the number of instruction
cycles before the output is driven active. If the value is
greater than the duty cycle, the corresponding output
remains
Section 14.4.5 “Programmable Dead-Band Delay
Mode”
operations.
FIGURE 14-9:
 2010 Microchip Technology Inc.
Standard Half-Bridge Circuit (“Push-Pull”)
Half-Bridge Output Driving a Full-Bridge Circuit
for more details of the dead-band delay
Figure
inactive
HALF-BRIDGE MODE
14-9, or for Full-Bridge applications,
during
EXAMPLE OF HALF-BRIDGE APPLICATIONS
the
PxA
PxB
entire
Figure
cycle.
PxA
PxB
FET
Driver
FET
Driver
14-9).
See
Preliminary
FET
Driver
FET
Driver
Since the PxA and PxB outputs are multiplexed with the
PORT data latches, the associated TRIS bits must be
cleared to configure PxA and PxB as outputs.
FIGURE 14-8:
PxA
PxB
td = Dead-Band Delay
Note 1: At this time, the TMRx register is equal to the
Load
PIC18(L)F2X/4XK22
V+
(2)
(2)
2: Output signals are shown as active-high.
(1)
td
PRx register.
Pulse Width
Load
Period
td
FET
Driver
FET
Driver
EXAMPLE OF HALF-
BRIDGE PWM OUTPUT
+
-
+
-
(1)
DS41412D-page 191
Period
(1)