PIC16F818-E/SO Microchip Technology, PIC16F818-E/SO Datasheet - Page 100
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,18PIN,PLASTIC](/photos/6/76/67656/150-18-soic_sml.jpg)
PIC16F818-E/SO
Manufacturer Part Number
PIC16F818-E/SO
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,18PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F818-ISO.pdf
(176 pages)
4.PIC16F818-ISO.pdf
(6 pages)
5.PIC16F818-ISO.pdf
(8 pages)
6.PIC16F818-ISO.pdf
(8 pages)
Specifications of PIC16F818-E/SO
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
18-SOIC (7.5mm Width)
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
I2C, SPI, SSP
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
1 x 16 bit
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014
Minimum Operating Temperature
- 40 C
On-chip Adc
5 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F818-E/SO
Manufacturer:
Microchip Technology
Quantity:
135
PIC16F818/819
12.12 Watchdog Timer (WDT)
For PIC16F818/819 devices, the WDT is driven by the
INTRC oscillator. When the WDT is enabled, the
INTRC (31.25 kHz) oscillator is enabled. The nominal
WDT period is 16 ms and has the same accuracy as
the INTRC oscillator.
During normal operation, a WDT time-out generates a
device Reset (Watchdog Timer Reset). If the device is
in Sleep mode, a WDT time-out causes the device to
wake-up and continue with normal operation (Watchdog
Timer wake-up). The TO bit in the Status register will be
cleared upon a Watchdog Timer time-out.
The WDT can be permanently disabled by clearing con-
figuration bit, WDTEN (see Section 12.1 “Configuration
Bits”).
FIGURE 12-8:
TABLE 12-5:
DS39598E-page 98
81h,181h OPTION_REG
2007h
Legend: Shaded cells are not used by the Watchdog Timer.
Note 1:
Address
Configuration bits
See Register 12-1 for operation of these bits.
SUMMARY OF WATCHDOG TIMER REGISTERS
Name
Note: PSA and PS2:PS0 are bits in the OPTION_REG register.
Enable Bit
31.25 kHz
INTRC
WDT
WATCHDOG TIMER BLOCK DIAGRAM
From TMR0 Clock Source
(Figure 6-1)
(1)
RBPU
Bit 7
LVP
0
1
INTEDG
BOREN
Bit 6
PSA
M
U
X
MCLRE
T0CS
Bit 5
0
Time-out
WDT time-out period values may be found in
Section 15.0 “Electrical Characteristics” under
parameter #31. Values for the WDT prescaler (actually
a postscaler but shared with the Timer0 prescaler) may
be assigned using the OPTION_REG register.
MUX
WDT
FOSC2
8-to-1 MUX
T0SE
Postscaler
Bit 4
Note 1: The CLRWDT and SLEEP instructions
1
8
2: When a CLRWDT instruction is executed
PWRTEN
clear the WDT and the postscaler if
assigned to the WDT and prevent it from
timing out and generating a device Reset
condition.
and the prescaler is assigned to the WDT,
the prescaler count will be cleared but the
prescaler assignment is not changed.
Bit 3
PSA
PSA
To TMR0 (Figure 6-1)
PS2:PS0
WDTEN
2004 Microchip Technology Inc.
Bit 2
PS2
FOSC1
Bit 1
PS1
FOSC0
Bit 0
PS0