PIC16F721-I/ML Microchip Technology, PIC16F721-I/ML Datasheet - Page 29

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

Specifications of PIC16F721-I/ML

• 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-VFQFN Exposed Pad
• 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

EXAMPLE 7-8:
 2011 Microchip Technology Inc.
Note 1: User ID values in this example are random values.
PIC16LF721 Configuration Word 1
2: Configuration Word 1 and 2 = all bits are ‘1’, except the code-protect enable bit.
3: Configuration Word 1 and 2 Mask = all Configuration Word bits are set to ‘1’, except for unimplemented
4: << = shift left, thus the LSb of the first user ID value is the MSb of the sum of user IDs and so on until
5: On the PIC16LF721 device, the VCAPEN bit is not implemented in Configuration Word 2; thus, all
bits which read ‘0’.
the LSb of the last user ID value becomes the LSb of the sum of user IDs.
unimplemented bits are ‘0’.
Checksum
Sum of User IDs
Configuration Word 1 mask
Configuration Word 2
Configuration Word 2 mask
User ID (2000h)
User ID (2001h)
User ID (2002h)
User ID (2003h)
CHECKSUM COMPUTED WITH CODE PROTECTION ENABLED (PIC16LF721),
00AAh AT FIRST AND LAST ADDRESS
(1)
(1)
(1)
(1)
(4)
(2)
(2)
= (3FBFh and 337Bh) + (3FFFh and 0003h) + Sum of User IDs
= CC13h
= (0009h and 000Fh) << 12 + (0008h and 000Fh) << 8 +
= 9000h + 0800h + 00D0h + 0005h
= 98D5h
= 333Bh +0003h + 98D5h
Advance Information
(000Dh and 000Fh) << 4 + (0005h and 000Fh)
(3)
(3), (5)
PIC16(L)F720/721
0009h
0008h
000Dh
0005h
3FBFh
337Bh
3FFFh
0003h
DS41409B-page 29