PIC18LF2431-I/SO Microchip Technology, PIC18LF2431-I/SO Datasheet - Page 218

• Manufacturer Part Number: PIC18LF2431-I/SO
• Description: IC MCU FLASH 8KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2431-I/SO

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC18
• No. Of I/o's: 24
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Processor Series: PIC18LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: EUSART, I2C, SPI, SSP
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 1 x 8
• 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, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DM183021, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC18F2331/2431/4331/4431
FIGURE 18-1:
DS39616C-page 216
SDO
SCK
SDI
SS
Peripheral OE
Read
SS Control
TRISC<3>
Select
Edge
Enable
Select
bit 0
Edge
SSPBUF Reg
SSP BLOCK DIAGRAM
(SPI MODE)
SSPM3:SSPM0
SSPSR Reg
Clock Select
4
2
Prescaler
Write
4, 16, 64
Clock
TMR2 Output
Shift
Data Bus
Internal
2
T
CY
Preliminary
To enable the serial port, SSP Enable bit, SSPEN
(SSPCON<5>), must be set. To reset or reconfigure
SPI mode, clear bit SSPEN, reinitialize the SSPCON
register and then set bit SSPEN. This configures the
SDI, SDO, SCK and SS pins as serial port pins. For the
pins to behave as the serial port function, they must
have their data direction bits (in the TRISC register)
appropriately programmed. That is:
• Serial Data Out (SDO) – RC7/RX/DT/SDO or
• SDI must have TRISC<4> or TRISD<2> set
• SDO must have TRISC<7> or TRISD<1> cleared
• SCK (Master mode) must have TRISC<5> or
• SCK (Slave mode) must have TRISC<5> or
• SS must have TRISA<6> set
RD1/SDO
TRISD<3> cleared
TRISD<3> set
Note 1: When the SPI is in Slave mode with
2: If the SPI is used in Slave mode with
3: When the SPI is in Slave mode with SS pin
the
(SSPCON<3:0> = 0100), the SPI module
will reset if the SS pin is set to V
CKE = 1, then the SS pin control must be
enabled.
control enabled (SSPCON<3:0> = 0100),
the state of the SS pin can affect the state
read back from the TRISC<6> bit. The
peripheral OE signal from the SSP module
into PORTC controls the state that is read
back
Section 10.3 “PORTC, TRISC and LATC
Registers” for information on PORTC). If
Read-Modify-Write instructions, such as
BSF, are performed on the TRISC register
while the SS pin is high, this will cause the
TRISC<6> bit to be set, thus disabling the
SDO output.
from
SS
© 2007 Microchip Technology Inc.
the
pin
TRISC<6>
control
DD
bit
enabled
.
(see