PIC16C781-I/SO Microchip Technology, PIC16C781-I/SO Datasheet - Page 24

• Manufacturer Part Number: PIC16C781-I/SO
• Description: 1.75 KB OTP, 128 RAM, 16 I/O 20 SOIC .300in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C781-I/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 ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGAC164028 - MODULE SKT PROMATEII 20SOIC/DIP
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: PIC16C781I/SO

PIC16C781/782
2.8
The Power Control (PCON) register contains two flag
bits to allow determination of the source of the most
recent RESET:
• Power-on Reset (POR)
• External MCLR Reset
• Power Supply Brown-out (BOR) Reset
The Power Control register also contains frequency
select bits for the INTRC oscillator and the WDT soft-
ware enable bit.
REGISTER 2-6:
DS41171A-page 22
Note:
PCON Register
bit 7-5
bit 4
bit 3
bit 2
bit 1
bit 0
BOR is unknown on Power-on Reset. It
must then be set by the user and checked
on subsequent RESETS to see if BOR is
clear, indicating a brown-out has occurred.
The BOR status bit is a don't care and is
not necessarily predictable if the brown-out
circuit is disabled (by clearing the BODEN
bit in the Configuration word).
Unimplemented: Read as '0'
WDTON: WDT Software Enable bit
If WDTE bit (Configuration Word <3>) = 1:
This bit is not writable, always reads ‘1’
If WDTE bit (Configuration Word <3>) = 0:
1 = WDT is enabled
0 = WDT is disabled
OSCF: Oscillator Speed INTRC Mode bit
1 = 4 MHz typical
0 = 37 kHz typical
All other oscillator modes (X = Ignored)
Unimplemented: Read as '0'
POR: Power-on Reset Status bit
1 = No Power-on Reset occurred
0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)
BOR: Brown-out Reset Status bit
1 = No Brown-out Reset occurred
0 = A Brown-out Reset occurred
POWER CONTROL REGISTER (PCON: 8Eh)
bit 7
Legend:
q = Value depends on conditions
R = Readable bit
- n = Value at POR
U-0
—
U-0
—
Preliminary
W = Writable bit
’1’ = Bit is set
U-0
—
WDTON
R/W-q
4 MHz
37 kHz 4 MHz
Direction of Change
Note:
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
37 kHz
R/W-1
OSCF
When changing the internal oscillator
speed (i.e., the OSCF bit, INTRC mode),
the processor will be inactive during the
oscillator frequency change.
U-0
—
2001 Microchip Technology Inc.
Minimum
Typical Time Inactive
1.25 s
100 s
x = Bit is unknown
R/W-q
POR
Maximum
3.25 s
300 s
R/W-q
BOR
bit 0