PIC16F877-20I/PT Microchip Technology, PIC16F877-20I/PT Datasheet - Page 504

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

Specifications of PIC16F877-20I/PT

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• 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: -40°C ~ 85°C
• 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
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 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: - 40 C
• On-chip Adc: 8-ch x 10-bit
• 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: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
27.3
27.3.1
DS31027A-page 27-8
Program Verification/Code Protection
ROM Devices
If the code protection bit(s) have not been programmed, the on-chip program memory can be
read out for verification purposes.
When a ROM device also has Data EEPROM memory, an additional code protect configuration
bit may be implemented. The program memory configuration bit is submitted as part of the ROM
code submittal. The Data EEPROM memory code protect configuration bit will be an EEPROM
bit. When ROM devices complete testing, the EEPROM data memory code protect bit will be pro-
grammed to the same state as the program memory code protect bit. That is data EEPROM code
protect is off, when program memory code protect is off, and data EEPROM code protect is on
for all other selections.
In applications where the device is code protected and the data EEPROM needs to be pro-
grammed before the application can be released, the data EEPROM memory must have the
entire data EEPROM memory erased. The device programming specification details the steps to
do this. Microchip device programmers implement the specified sequence. Once this sequence
is complete, the Data EEPROM memory code protect is disabled. This allows the desired data
to be programmed into the device. After programming the data EEPROM memory array, the data
EEPROM memory code protect configuration bit should be programmed as desired.
Note:
Microchip does not recommend code protecting windowed devices.
1997 Microchip Technology Inc.