PIC18F4431-E/ML Microchip Technology, PIC18F4431-E/ML Datasheet - Page 51

• Manufacturer Part Number: PIC18F4431-E/ML
• Description: IC MCU FLASH 8KX16 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4431-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 36
• 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 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.6
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal
operation.
FIGURE 5-3:
FIGURE 5-4:
 2010 Microchip Technology Inc.
INTERNAL RESET
INTERNAL RESET
PWRT TIME-OUT
PWRT TIME-OUT
INTERNAL POR
OST TIME-OUT
OST TIME-OUT
INTERNAL POR
Reset State of Registers
MCLR
MCLR
V
V
DD
DD
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO V
TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO V
PIC18F2331/2431/4331/4431
T
PWRT
T
PWRT
Status bits from the RCON register (RI, TO, PD, POR
and BOR) are set or cleared differently in different
Reset situations, as indicated in
are used in software to determine the nature of the
Reset.
Table 5-3
Special Function Registers. These are categorized by
Power-on and Brown-out Resets, Master Clear and
WDT Resets, and WDT wake-ups.
T
OST
describes the Reset states for all of the
T
OST
DD
, V
DD
DD
Table
): CASE 1
RISE < T
DS39616D-page 51
5-2. These bits
PWRT
)