PIC18F8490T-I/PT Microchip Technology, PIC18F8490T-I/PT Datasheet - Page 12
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC18F8490T-I/PT
Manufacturer Part Number
PIC18F8490T-I/PT
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,80PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F6310-IPT.pdf
(28 pages)
3.PIC18F6390-IPT.pdf
(414 pages)
4.PIC18F6390-IPT.pdf
(16 pages)
5.PIC18F6390-IPT.pdf
(12 pages)
6.PIC18F6390-IPT.pdf
(6 pages)
7.PIC18F6390-IPT.pdf
(4 pages)
Specifications of PIC18F8490T-I/PT
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
Number Of I /o
66
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
SPI, I2C, EUSART, AUSART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
66
Number Of Timers
1 x 8
Operating Supply Voltage
4.2 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, ICE4000, DV164136, DM163028
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Data Rom Size
768 B
Height
1 mm
Length
12 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.2 V
Width
12 mm
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With
XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPDM163028 - BOARD DEMO PICDEM LCDAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F8490T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
PIC18F8410/8490/8493 FAMILY
3.2
Erasing code is accomplished by writing an “erase
option” to address 3C0004h. Code memory is erased
by erasing the entire device in one action. “Chip Erase”
operations will also clear any code-protect settings.
Chip Erase is detailed in Table 3-1.
TABLE 3-1
The actual Chip Erase function is a self-timed
operation. Once the erase has started (falling edge of
the 4th PGC after the NOP instruction), serial execution
will cease until the erase completes (parameter P11).
During this time, PGC may continue to toggle, but PGD
must be held low. Refer to Figure 3-3.
The code sequence to erase the entire device is shown
in Table 3-2 and the flowchart is shown in Figure 3-2.
FIGURE 3-3:
DS39624C-page 12
Chip Erase
PGC
PGD
Note:
4-Bit Command
High-Voltage ICSP Chip Erase
1
0
A Chip Erase is the only way to reprogram
code-protect bits from an ON state to an
OFF state.
2
0
Description
3
1
CHIP ERASE OPTION
4
1
P5
Chip Erase Instruction
CHIP ERASE TIMING
1
0
Data Payload
2
1
16-Bit
15 16
0
0
P5A
4-Bit Command
1
0
018Ah
Data
2
0
3
0
PGD = Input
4
0
P5
1
NOP Instruction
0
Data Payload
2
0
16-Bit
TABLE 3-2
FIGURE 3-2:
Command
15 16
0
0000
0000
0000
0000
0000
0000
1100
0000
0000
1100
0000
0000
4-Bit
0
P5A
4-Bit Command
1
0
Payload
2
0
0E 3C
6E F8
0E 00
6E F7
0E 05
6E F6
01 0A
0E 04
6E F6
01 8A
00 00
Data
3
CHIP ERASE COMMAND
SEQUENCE
0
Delay P11 + P10
Load Address
Write 018Ah
4
0
Pointer to
3C0004h
to Erase
CHIP ERASE FLOW
Device
Done
Time
© 2007 Microchip Technology Inc.
Start
MOVLW 3Ch
MOVWF TBLPTRU
MOVLW 00h
MOVWF TBLPTRH
MOVLW 05h
MOVWF TBLPTRL
Write 01 to 3C0005h
MOVLW 04h
MOVWF TBLPTRL
Write 8Ah TO 3C0004h
to erase device.
NOP
Hold PGD low until
erase completes.
Erase Time
P11
Core Instruction
P10
Data Payload
16-Bit
1
n
2
n