PIC18F2515-E/SP Microchip Technology, PIC18F2515-E/SP Datasheet - Page 10

• Manufacturer Part Number: PIC18F2515-E/SP
• Description: IC MCU FLASH 24KX16 28-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2515-E/SP

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 48KB (24K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• For Use With: DVA18XP280 - DEVICE ADAPTER 18F2220 PDIP 28LD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

PIC18F2515/2610/4515/4610
31. Module: MSSP
32. Module: MSSP
DS80199E-page 10
Setting the SEN bit initiates a Start sequence on
the bus, after which, the SEN bit is cleared auto-
matically by hardware. If the SEN bit is set again
(without an address byte being transmitted), a
Start sequence will not commence and the SEN bit
will not be cleared. This condition causes the bus
to remain in an active state. The system is Idle
when ACKEN, RCEN, PEN, RSEN, and SEN are
clear.
Work around
Set the PEN or RSEN bit to transmit a Stop or
Repeated Start sequence, although the SEN bit
may still be set, indicating the bus is active. After
the sequence has completed, the PEN, RSEN and
SEN bit will be clear, indicating the bus is Idle.
Clearing and setting the SSPEN bit will also reset
the I
SEN status bits.
Date Codes that pertain to this issue:
All engineering and production devices.
In SPI mode, the Buffer Full flag (BF bit in the
SSPSTAT register), the Write Collision Detect bit
(WCOL bit in SSPCON1) and the Receive
Overflow Indicator bit (SSPOV in SSPCON1) are
not reset upon disabling the SPI module (by
clearing the SSPEN bit in the SSPCON1 register).
For example, if SSPBUF is full (BF bit is set) and
the MSSP module is disabled and re-enabled, the
BF bit will remain set. In SPI Slave mode, a sub-
sequent write to SSPBUF will result in a write
collision. Also, if a new byte is received, a receive
overflow will occur.
Work around
Ensure that if the buffer is full, SSPBUF is read
(thus clearing the BF flag) and WCOL is clear
before disabling the MSSP module. If the module
is configured in SPI Slave mode, ensure that the
SSPOV bit is clear before disabling the module.
Date Codes that pertain to this issue:
All engineering and production devices.
2
C peripheral and clear the PEN, RSEN and
33. Module: MSSP (SPI Mode)
FIGURE 1:
EXAMPLE 5:
LOOP BTFSS SSPSTAT, BF
When the SPI is using Timer2/2 as the clock
source, a shorter than expected SCK pulse may
occur on the first bit of the transmitted/received
data (Figure 1).
Work around
To avoid producing the short pulse, turn off Timer2
and clear the TMR2 register, load the SSPBUF
with the data to transmit and then turn Timer2 back
on. Refer to Example 5 for sample code.
Date Codes that pertain to this issue:
All engineering and production devices.
BRA
MOVF
MOVWF RXDATA
MOVF
BCF
CLRF
MOVWF SSPBUF
BSF
SDO
SCK
Write SSPBUF
LOOP
SSPBUF, W
TXDATA, W
T2CON, TMR2ON
TMR2
T2CON, TMR2ON
bit 0 = 1 bit 1 = 0
SCK PULSE VARIATION
USING TIMER2/2
AVOIDING THE INITIAL
SHORT SCK PULSE
© 2007 Microchip Technology Inc.
;Data received?
;(Xmit complete?)
;No
;W = SSPBUF
;Save in user RAM
;W = TXDATA
;Timer2 off
;Clear Timer2
;Xmit New data
;Timer2 on
bit 2 = 1
. . . .