PIC18F2331-E/MM Microchip Technology, PIC18F2331-E/MM Datasheet - Page 166

• Manufacturer Part Number: PIC18F2331-E/MM
• Description: IC MCU FLASH 4KX16 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2331-E/MM

• 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: 24
• Program Memory Size: 8KB (4K 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 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-QFN
• Core: PIC
• Processor Series: PIC18F
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Data Ram Size: 768 B
• Data Rom Size: 256 B
• On-chip Adc: Yes
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• Mounting Style: SMD/SMT
• A/d Bit Size: 10 bit
• A/d Channels Available: 5
• Height: 0.88 mm
• Interface Type: EUSART, I2C, SPI, SSP
• Length: 6 mm
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 5.5 V, 5.8 V
• Supply Voltage (min): 3.9 V, 4.2 V
• Width: 6 mm
• For Use With: I3-DB18F4431 - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: PIC18F2331-E/ML; PIC18F2331-E/ML

PIC18F2331/2431/4331/4431
FIGURE 17-11:
DS39616D-page 166
Note 1: POSCNT register is shown in QEI x4 Update mode (POSCNT increments on every rising and every falling edge of
QEA
QEB
Count (+/-)
POSCNT
MAXCNT
INDX
IC2QEIF
UP/DOWN
Position
Counter Load
2: When an INDX Reset pulse is detected, POSCNT is reset to ‘0’ on the next QEA or QEB edge. POSCNT is set to
3: IC2QEIF is enabled for one T
4: The position counter is loaded with 0000h (i.e., Reset) on the next QEA or QEB edge when the INDX is high.
5: The position counter is loaded with a MAXCNT value (e.g., 1527h) on the next QEA or QEB edge following the
6: IC2QEIF must be cleared in software.
QEA and QEB input signals).
MAXCNT when POSCNT = 0 (when decrementing), which occurs on the next QEA or QEB edge. a similar Reset
sequence occurs for the reverse direction, except that the INDX signal is recognized on its falling edge. The Reset
is generated on the next QEA or QEB edge.
INDX falling edge input signal detect).
(1)
QEI MODULE RESET TIMING WITH THE INDEX INPUT
+1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1
MAXCNT = 1527
Note 2
Q1
Q4
Forward
CY
(4)
(3)
clock cycle.
Note 6
-1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
Note 2
Q1
Q4
(5)
(3)
Reverse
 2010 Microchip Technology Inc.