PIC16F877-04E/PT Microchip Technology, PIC16F877-04E/PT Datasheet - Page 165

• Manufacturer Part Number: PIC16F877-04E/PT
• Description: IC MCU FLASH 8KX14 EE 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-04E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 14KB (8K x 14)
• 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: -40°C ~ 125°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PIC16F87704E/PT

10.4
10.5
10.6
PORTD<7:0>
PORTD<7:0>
1997 Microchip Technology Inc.
PSPIF
PSPIF
OBF
OBF
CS
WR
RD
IBF
CS
WR
RD
IBF
Note:
Operation in Sleep Mode
Effect of a Reset
PSP Waveforms
The IBF flag bit is inhibited from being cleared until after this point.
Q1
Q1
When in sleep mode the microprocessor may still read and write the Parallel Slave Port. These
actions will set the PSPIF bit. If the PSP interrupts are enabled, this will wake the processor from
sleep mode so that the PSP data latch may be either read, or written with the next value for the
microprocessor.
After any reset the PSP is disabled and PORTD and PORTE are forced to their default mode.
Figure 10-2
Figure 10-3
Figure 10-2: Parallel Slave Port Write Waveforms
Figure 10-3: Parallel Slave Port Read Waveforms
Q2
Q2
shows the waveform for a read of the PSP by the microprocessor.
shows the waveform for a write from the microprocessor to the PSP, while
Q3
Q3
Section 10. Parallel Slave Port
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
Q4
Q4
Q1
Q1
Q2
Q2
Q3
Q3
DS31010A-page 10-5
Q4
Q4
10