PIC16F877-20/PT Microchip Technology, PIC16F877-20/PT Datasheet - Page 118

• Manufacturer Part Number: PIC16F877-20/PT
• Description: IC MCU FLASH 8KX14 EE 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/PT

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 368 B
• Interface Type: MSSP, PSP, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
• Minimum Operating Temperature: 0 C
• On-chip Adc: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Details

PICmicro MID-RANGE MCU FAMILY
7.7
DS31007A-page 7-6
Write Verify
Depending on the application, good programming practice may dictate that the value written to
the Data EEPROM be verified
should be used in applications where an EEPROM bit will be stressed near the specification limit.
The Total Endurance disk will help determine your comfort level.
Example 7-3: Write Verify
READ
;
; Is the value written (in W reg) and read (in EEDATA) the same?
;
BCF
:
:
MOVF
BSF
BSF
BCF
SUBWF EEDATA, W
BTFSS STATUS, Z
GOTO
:
:
STATUS, RP0 ; Bank0
EEDATA, W
STATUS, RP0 ; Bank1
EECON1, RD
STATUS, RP0 ; Bank0
WRITE_ERR
(Example
; Any code can go here
;
; Must be in Bank0
; YES, Read the value written
;
; Is difference 0?
; NO, Write error
; YES, Good write
; Continue program
7-3) as the value that was intended to be written. This
1997 Microchip Technology Inc.