PIC16C781-E/SO Microchip Technology, PIC16C781-E/SO Datasheet - Page 119

• Manufacturer Part Number: PIC16C781-E/SO
• Description: IC MCU OTP 1KX14 W/AD 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C781-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 1.75KB (1K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x8b; D/A 1x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-SOIC (7.5mm Width)
• For Use With: AC164028 - MODULE SKT PROMATEII 20SOIC/DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

14.0
These devices have a host of features intended to max-
imize system reliability, minimize cost through elimina-
tion of external components, provide power saving
operating modes and offer code protection. These fea-
tures include:
• Oscillator selection
• RESET
• Interrupts
• Watchdog Timer (WDT)
• Programmable Low Voltage Detection (PLVD)
• SLEEP
• Code protection
• ID locations
• In-Circuit Serial Programming
Several oscillator options are available to allow the part
to fit the application. The INTRC oscillator options save
system cost while the LP crystal option saves power. A
set of configuration bits is used to select various
options.
The CPU also features a Watchdog Timer (WDT),
which can be enabled either through a configuration bit
during programming, or by the software. For added reli-
ability, the WDT runs off its own internal RC oscillator
instead of the main CPU clock.
In addition to the WDT, the CPU incorporates both an
Oscillator Start-up Timer and a Power-up Timer. The
Oscillator Start-up Timer (OST) is intended to hold the
chip in RESET until the crystal oscillator has stabilized.
The Power-up Timer (PWRT) holds the CPU in a fixed
RESET delay of 72ms (nominal) on Power-up Resets
(POR and PBOR), while the power supply stabilizes.
With these two timers on-chip, most applications need
no external RESET circuitry.
SLEEP mode is designed to offer a very low current
power-down mode. The user can awaken from SLEEP
through:
• External RESET
• Watchdog Timer Wake-up
• Interrupt
Additional information on special features is available
in the PICmicro™ Mid-Range Reference Manual,
(DS33023).
- Power-on Reset (POR)
- Power-up Timer (PWRT)
- Oscillator Start-up Timer (OST)
- Programmable Brown-out Reset (PBOR)
2001 Microchip Technology Inc.
SPECIAL FEATURES OF THE
CPU
TM
(ICSP
TM
)
Preliminary
14.1
The configuration bits can be programmed (read as '0'),
or left unprogrammed (read as '1'), to select various
device configurations. These bits are mapped in pro-
gram memory location 2007h.
Some of the core features provided may not be neces-
sary for each application in which a device may be
used. The configuration word bits allow these features
to be configured/enabled/disabled as necessary.
These features include:
• Code Protection
• PBOR Trip Point
• Power-up Timer
• Watchdog Timer
• Device Oscillator Mode
As can be seen in Table 14-1, some additional configu-
ration word bits have been provided for Brown-out
Reset trip point selection.
Note:
Configuration Bits
Address 2007h is beyond the user pro-
gram memory space, which can be
accessed only during programming.
PIC16C781/782
DS41171A-page 117