PIC18LF2331-I/SO Microchip Technology, PIC18LF2331-I/SO Datasheet - Page 7

• Manufacturer Part Number: PIC18LF2331-I/SO
• Description: IC MCU FLASH 4KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2331-I/SO

• 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): 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)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.4
Figure 2-7 shows the high level overview of the pro-
gramming process. First, a bulk erase is performed.
Next, the code memory, ID locations, and data
EEPROM are programmed. These memories are then
verified to ensure that programming was successful. If
no errors are detected, the configuration bits are then
programmed and verified.
2.5
The High Voltage ICSP Program/Verify mode is
entered by holding SCLK and SDATA low and then
raising MCLR/V
mode, the code memory, data EEPROM, ID locations,
and
programmed in serial fashion.
The sequence that enters the device into the Program/
Verify mode places all unused I/Os in the high
impedance state.
2.5.1
When the LVP configuration bit is ‘1’ (see Section 5.3),
the Low Voltage ICSP mode is enabled. Low Voltage
ICSP Program/Verify mode is entered by holding SCLK
and SDATA low, placing a logic high on PGM, and then
raising MCLR/V
pin is dedicated to the programming function and
ceases to be a general purpose I/O pin.
The sequence that enters the device into the Program/
Verify mode places all unused I/Os in the high
impedance state.
FIGURE 2-6:
 2010 Microchip Technology Inc.
MCLR/V
V
SDATA
SCLK
configuration
DD
High Level Overview of the
Programming Process
Entering High Voltage ICSP
Program/Verify Mode
D110
ENTERING LOW VOLTAGE ICSP
PROGRAM/VERIFY MODE
PP
PP
PP
to V
to V
SDATA = Input
P13
bits
ENTERING HIGH
VOLTAGE PROGRAM/
VERIFY MODE
P1
IHH
IH
. In this mode, the RB5/PGM
(high voltage). Once in this
can
P12
be
accessed
PIC18F2331/2431/4331/4431
and
FIGURE 2-7:
FIGURE 2-8:
MCLR/V
V
PGM
SDATA
SCLK
DD
PP
V
IH
Program Memory
Configuration Bits
Configuration Bits
Verify Program
Program Data
V
Perform Bulk
Program IDs
SDATA = Input
Verify Data
IH
Verify IDs
P15
Program
HIGH LEVEL
PROGRAMMING FLOW
ENTERING LOW
VOLTAGE PROGRAM/
VERIFY MODE
Erase
Verify
Done
Start
P12
DS30500B-page 7