PIC16F721-I/SO Microchip Technology, PIC16F721-I/SO Datasheet - Page 69

• Manufacturer Part Number: PIC16F721-I/SO
• Description: MCU PIC 4K FLASH 20-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-I/SO

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 17
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 18
• Ram Memory Size: 256Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.4
The Oscillator Control (OSCCON) register
displays the status and allows frequency selection of the
internal
OSCCON register contains the following bits:
• Frequency selection bits (IRCF)
• Status Locked bits (ICSL)
• Status Stable bits (ICSS)
REGISTER 7-1:
 2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
q = Value depends on condition
bit 7-6
bit 5-4
bit 3
bit 2
bit 1-0
U-0
—
Oscillator Control
oscillator
Unimplemented: Read as ‘0’
IRCF<1:0>: Internal Oscillator Frequency Select bits
When PLLEN = 1 (16 MHz HFINTOSC)
11 = 16 MHz
10 = 8 MHz (POR value)
01 = 4 MHz
00 = 2 MHz
When PLLEN = 0 (500 kHz MFINTOSC)
11 = 500 kHz
10 = 250 kHz (POR value)
01 = 125 kHz
00 = 62.5 kHz
ICSL: Internal Clock Oscillator Status Locked bit (2% Stable)
1 = 16 MHz/500 kHz internal oscillator is in lock
0 = 16 MHz/500 kHz internal oscillator has not yet locked
ICSS: Internal Clock Oscillator Status Stable bit (0.5% Stable)
1 = 16 MHz/500 kHz internal oscillator has stabilized to its maximum accuracy
0 = 16 MHz/500 kHz internal oscillator has not yet reached its maximum accuracy
Unimplemented: Read as ‘0’
(INTOSC)
U-0
—
OSCCON: OSCILLATOR CONTROL REGISTER
W = Writable bit
‘1’ = Bit is set
system
IRCF1
R/W-1
clock.
(Figure
IRCF0
R/W-0
7-1)
The
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
ICSL
R-q
PIC16F/LF720/721
ICSS
R-q
x = Bit is unknown
U-0
—
DS41430A-page 69
U-0
—
bit 0