PIC16F721-E/ML Microchip Technology, PIC16F721-E/ML Datasheet - Page 71

• Manufacturer Part Number: PIC16F721-E/ML
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 QFN 4x4mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• 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 ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.6
7.6.1
The External Clock (EC) mode allows an externally
generated logic level as the system clock source. When
operating in this mode, an external clock source is
connected to the CLKOUT input and the CLKIN is
available for general purpose I/O.
pin connections for EC mode.
FIGURE 7-2:
TABLE 7-1:
 2010 Microchip Technology Inc.
CONFIG1
OSCCON
OSCTUNE
Legend:
Note 1:
Clock from
Ext. System
Name
External Clock Modes
(1)
x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by oscillators.
See Configuration Word 1 (Register 8-1) for operation of all bits.
EC MODE
Bit 7
I/O
—
—
—
SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES
EXTERNAL CLOCK (EC)
MODE OPERATION
Bit 6
CP
—
—
CLKIN
CLKOUT
Figure 7-2
MCLRE
IRCF1
TUN5
Bit 5
PIC
®
MCU
PWRTE
IRCF0
shows the
TUN4
Bit 4
WDTEN
TUN3
ICSL
Bit 3
TUN2
ICSS
Bit 2
—
PIC16F/LF720/721
FOSC1
TUN1
Bit 1
—
FOSC0
TUN0
Bit 0
—
--10 qq--
--00 0000
POR, BOR
Value on
—
DS41430A-page 71
--10 qq--
--uu uuuu
Value on
Resets
all other
—
(1)