PIC16F1937-I/ML Microchip Technology, PIC16F1937-I/ML Datasheet - Page 37

• Manufacturer Part Number: PIC16F1937-I/ML
• Description: IC PIC MCU FLASH 512KX14 44-QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1937-I/ML

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFN
• Controller Family/series: PIC16F
• No. Of I/o's: 36
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EXAMPLE 7-2:
7.4.2
With the program code protection enabled the check-
sum is computed in the following manner. The Least
Significant nibble of each user ID is used to create a
16-bit value. The masked value of user ID location
8000h is the Most Significant nibble. This sum of user
IDs is summed with the Configuration Words (all unim-
plemented Configuration bits are masked to ‘0’).
EXAMPLE 7-3:
 2010 Microchip Technology Inc.
PIC16LF1936 Sum of Memory addresses 0000h-1FFFh
PIC16F1936
Note:
Note 1: In PIC16F194X devices, the VCAPEN<1> bit is not implemented in Configuration Word 2 and the
Note 1: In PIC16F194X devices, the VCAPEN<1> bit is not implemented in Configuration Word 2 and the
PIC16F193X/LF193X/PIC16F194X/LF194X/
PROGRAM CODE PROTECTION
ENABLED
Data
checksum.
Configuration Word 2 mask is 3713h.
Configuration Word 2 mask is 3713h.
Configuration Word 2 mask
Checksum = 6156h + (3FFFh and 3FFFh) + (3FFFh and 3703h)
Configuration Word 1
Configuration Word 1 mask
Configuration Word 2
memory
CHECKSUM COMPUTED WITH PROGRAM CODE PROTECTION DISABLED
PIC16LF1936, 00AAh AT FIRST AND LAST ADDRESS
CHECKSUM COMPUTED WITH PROGRAM CODE PROTECTION ENABLED
PIC16F1936, BLANK DEVICE
does
Configuration Word 1
Configuration Word 1 mask
Configuration Word 2
Configuration Word 2 mask
User ID (8000h)
User ID (8001h)
User ID (8002h)
User ID (8003h)
Sum of User IDs = (0005h and 000Fh) << 12 + (0007h and 000Fh) << 8 +
Checksum
not
= 6156h + 3FFFh + 3703h
= D858h
effect
(1)
the
= 5000h + 0700h + 0030h + 0002h
= 5732h
= (3F7Fh and 3FFFh) + (3FFFh and 3733h) + Sum of User IDs
= 3F7Fh + 3773h + 5732h
= CDE4h
(0003h and 000Fh) << 4 + (0002h and 000Fh)
(1)
6156h
3FFFh
3FFFh
3FFFh
3703h
3F7Fh
3FFFh
3FFFh
3733h
0005h
0007h
0003h
0002h
DS41397B-page 37