PIC18F4423-I/PT Microchip Technology, PIC18F4423-I/PT Datasheet - Page 12

• Manufacturer Part Number: PIC18F4423-I/PT
• Description: IC PIC MCU FLASH 8KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4423-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 16KB (8K x 16)
• Package / Case: 44-TQFP, 44-VQFP
• 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: 36
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 13x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: EUSART/I2C/MSSP/SPI
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 13-ch x 12-bit
• Controller Family/series: PIC18
• No. Of I/o's: 36
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• Rohs Compliant: Yes
• Package: 44TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F2423/2523/4423/4523
TABLE 3-3:
FIGURE 3-3:
DS39759A-page 12
Step 1: Direct access to code memory and enable writes.
Step 2: Point to first row in code memory.
Step 3: Enable erase and erase single row.
Step 4: Repeat step 3, with Address Pointer incremented by 64 until all rows are erased.
Command
0000
0000
0000
0000
0000
0000
0000
0000
0000
4-Bit
8E A6
9C A6
84 A6
6A F8
6A F7
6A F6
88 A6
82 A6
00 00
ERASE CODE MEMORY CODE SEQUENCE
Data Payload
SINGLE ROW ERASE CODE MEMORY FLOW
Addr = Addr + 64
BSF
BCF
BSF
CLRF
CLRF
CLRF
BSF
BSF
NOP – hold PGC high for time P9 and low for time P10.
EECON1, EEPGD
EECON1, CFGS
EECON1, WREN
TBLPTRU
TBLPTRH
TBLPTRL
EECON1, FREE
EECON1, WR
No
Start Erase Sequence
and Hold PGC High
Hold PGC Low
Row Erases
for Time P10
Core Instruction
for Time P9
Device for
Configure
done?
Start
Done
rows
All
Yes
Addr = 0
© 2005 Microchip Technology Inc.