PIC16F877-20/P Microchip Technology Inc., PIC16F877-20/P Datasheet - Page 93

• Manufacturer Part Number: PIC16F877-20/P
• Description: 40 PIN, 7 KB FLASH, 368 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F877-20/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 33
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Serial Interface: MSSP, USART
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

FIGURE 9-21:
FIGURE 9-22:
2001 Microchip Technology Inc.
SDA
SCL
SEN
BCLIF
S
SSPIF
BCLIF
S
SSPIF
SDA
SCL
SEN
BUS COLLISION DURING START CONDITION (SCL = 0)
BRG RESET DUE TO SDA COLLISION DURING START CONDITION
SDA pulled low by other master.
Reset BRG and assert SDA.
’0’
’0’
SCL = 0 before BRG time-out,
Bus collision occurs, Set BCLIF
’0’
Set SEN, enable START
sequence if SDA = 1, SCL = 1
Less than T
BRG
SDA = 0, SCL = 1
SDA = 0, SCL = 1
T
BRG
SDA = 0, SCL = 1
Set SSPIF
Set SEN, enable START
sequence if SDA = 1, SCL = 1
s
Set S
T
T
BRG
BRG
Set SSPIF
SCL = 0 before SDA = 0,
Bus collision occurs, Set BCLIF
SCL pulled low after BRG
Time-out
Interrupts cleared
in software
’0’
’0’
Interrupts cleared
in software
PIC16F87X
DS30292C-page 91