PIC18F442T-E/L Microchip Technology, PIC18F442T-E/L Datasheet - Page 4

• Manufacturer Part Number: PIC18F442T-E/L
• Description: IC MCU CMOS 40MHZ 8K FLSH 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F442T-E/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-PLCC
• For Use With: XLT44L2 - SOCKET TRAN ICE 44PLCCDVA16XL441 - ADAPTER DEVICE ICE 44PLCC
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

PIC18FXX2
9. Module: MSSP (SPI, Slave Mode)
10. Module: Core (Instruction Set)
EXAMPLE 2:
DS80127G-page 4
MOVLW
ADDLW
BTFSC
INCFSZ byte2
DAW
BTFSC
INCFSZ byte2
This is repeated for each DAW instruction.
In its current implementation, the SS (Slave
Select) control signal generated by an external
master processor may not be successfully recog-
nized by the PIC
Slave Select mode (SSPM3:SSPM0 = 0100). In
particular, it has been observed that faster transi-
tions (those with shorter fall-times) are more likely
to be missed than than slower transitions.
Work around
Insert a series resistor between the source of the
SS signal and the corresponding SS input line of
the microcontroller. The value of the resistor is
dependent on both the application system’s
characteristics and process variations between
microcontrollers. Experimentation and thorough
testing is encouraged.
This is a recommended solution. Others may exist.
Date Codes that pertain to this issue:
All engineering and production devices.
The Decimal Adjust W register instruction, DAW,
may improperly clear the Carry bit (STATUS<0>)
when executed.
Work around
Test the Carry bit state before executing the DAW
instruction. If the Carry bit is set, increment the
next higher byte to be added using an instruction
such as INCFSZ (this instruction does not affect
any Status flags, and will not overflow a BCD nib-
ble). After the DAW instruction has been executed,
process the Carry bit normally (see Example 2).
0x80
0x80
STATUS,C
STATUS,C
PROCESSING THE CARRY
BIT DURING BCD ADDITIONS
®
; .80 (BCD)
; .80 (BCD)
; test C
; inc next higher LSB
; test C
; inc next higher LSB
microcontroller operating in
11. Module: Timer1 Oscillator
12. Module: Reset
After the system clock source for the microcontrol-
ler is switched from the primary oscillator to the
Timer1 oscillator, an increase in system current
consumption may occur.
Work around
None
Date Codes that pertain to this issue:
All engineering and production devices.
It has been observed that in certain Reset condi-
tions, including power-up, the first GOTO instruction
at address 0x0000 may not be executed. This
occurrence is rare and affects very few applications.
To determine if your system is affected, test a
statistically significant number of applications across
the operating temperature, voltage and frequency
ranges of the application. Affected systems will
repeatably fail normal testing. Systems not affected
will continue to not be affected over time.
Work around
Insert a NOP instruction at address 0x0000.
Date Codes that pertain to this issue:
All engineering and production devices.
© 2005 Microchip Technology Inc.