PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 296

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• 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: 40-DIP (0.600", 15.24mm)
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
17.4.1
DS31017A-page 17-20
Slave Mode
In slave mode, the SCL and SDA pins must be configured as inputs. The SSP module will over-
ride the input state with the output data when required (slave-transmitter).
When an address is matched or the data transfer after an address match is received, the hard-
ware automatically will generate the acknowledge (ACK) pulse, and then load the SSPBUF reg-
ister with the received value currently in the SSPSR register.
There are certain conditions that will cause the SSP module not to give this ACK pulse. These
are if either (or both):
a)
b)
If the BF bit is set, the SSPSR register value is not loaded into the SSPBUF, but the SSPIF and
SSPOV bits are set.
the status of the BF and SSPOV bits. The shaded cells show the condition where user software
did not properly clear the overflow condition. The BF flag bit is cleared by reading the SSPBUF
register while bit SSPOV is cleared through software.
The SCL clock input must have a minimum high and low time for proper operation. The high and
low times of the I
parameters 100
The buffer full bit, BF (SSPSTAT<0>), was set before the transfer was received.
The overflow bit, SSPOV (SSPCON1<6>), was set before the transfer was received.
2
and
C specification as well as the requirement of the SSP module is shown in timing
Table 17-2
101
of the
Preliminary
shows what happens when a data transfer byte is received, given
“Electrical Specifications”
section.
1997 Microchip Technology Inc.