PIC18F25J10-I/SO Microchip Technology, PIC18F25J10-I/SO Datasheet - Page 237

• Manufacturer Part Number: PIC18F25J10-I/SO
• Description: IC PIC MCU FLASH 16KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F25J10-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 32KB (16K x 16)
• Package / Case: 28-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 21
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SPI/I2C/MSSP/USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DM183022, DM183032, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10-ch x 10-bit
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MILAC162074 - HEADER INTRFC MPLAB ICD2 44TQFPMA180011 - MODULE PLUG-IN 18F25J10 28SOICAC162067 - HEADER INTRFC MPLAB ICD2 40/28PAC164331 - MODULE SKT FOR 28SSOP 18F45J10
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

20.2
For PIC18F45J10 family devices, the WDT is driven by
the INTRC oscillator. When the WDT is enabled, the
clock source is also enabled. The nominal WDT period
is 4 ms and has the same stability as the INTRC
oscillator.
The 4 ms period of the WDT is multiplied by a 16-bit
postscaler. Any output of the WDT postscaler is
selected by a multiplexor, controlled by the WDTPS bits
in Configuration Register 2H. Available periods range
from 4 ms to 131.072 seconds (2.18 minutes). The
WDT and postscaler are cleared whenever a SLEEP or
CLRWDT instruction is executed, or a clock failure
(primary or Timer1 oscillator) has occurred.
FIGURE 20-1:
REGISTER 20-9:
TABLE 20-2:
© 2007 Microchip Technology Inc.
RCON
WDTCON
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the Watchdog Timer.
WDTPS3:WDTPD0
Name
All Device Resets
INTRC Oscillator
Watchdog Timer (WDT)
SWDTEN
CLRWDT
bit 7-1
bit 0
Sleep
IPEN
Bit 7
SUMMARY OF WATCHDOG TIMER REGISTERS
—
WDT BLOCK DIAGRAM
WDTCON: WATCHDOG TIMER CONTROL REGISTER
bit 7
Unimplemented: Read as ‘0’
SWDTEN: Software Controlled Watchdog Timer Enable bit
1 = Watchdog Timer is on
0 = Watchdog Timer is off
Legend:
R = Readable bit
-n = Value at POR
Note 1: This bit has no effect if the configuration bit, WDTEN, is enabled.
U-0
—
Bit 6
Enable WDT
—
—
WDT Counter
U-0
—
Bit 5
—
—
÷128
INTRC Control
4
U-0
Bit 4
—
Preliminary
Programmable Postscaler
RI
—
W = Writable bit
‘1’ = Bit is set
1:1 to 1:32,768
U-0
Bit 3
PIC18F45J10 FAMILY
—
TO
—
20.2.1
The WDTCON register (Register 20-9) is a readable
and writable register. The SWDTEN bit enables or
disables WDT operation.
Note 1: The CLRWDT and SLEEP instructions
2: When a CLRWDT instruction is executed,
Bit 2
U-0
PD
WDT
—
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
CONTROL REGISTER
clear the WDT and postscaler counts
when executed.
the postscaler count will be cleared.
Reset
(1)
POR
Bit 1
—
U-0
—
SWDTEN
Bit 0
BOR
x = Bit is unknown
U-0
—
DS39682C-page 235
Wake-up from
Power-Managed
Modes
WDT
Reset
Reset Values
SWDTEN
on page
R/W-0
44
44
bit 0
(1)