PIC18LF8628T-I/PT Microchip Technology, PIC18LF8628T-I/PT Datasheet - Page 15

• Manufacturer Part Number: PIC18LF8628T-I/PT
• Description: PIC18 With 96KB Flash, 4KB RAM, 1024 DataEE, 12-bit ADC 80 TQFP 12x12x1mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF8628T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 96KB (48K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PIC18LF8628T-I/PTTR

3.2
Programming code memory is accomplished by first
loading data into the write buffer and then initiating a
programming sequence. The write and erase buffer
sizes, shown in Table 3-4, can be mapped to any
location of the same size beginning at 000000h. The
actual memory write sequence takes the contents of
this buffer and programs the proper amount of code
memory that contains the Table Pointer.
The programming duration is externally timed and is
controlled by PGC. After a Start Programming
command is issued (4-bit command, ‘1111’), a NOP is
issued, where the 4th PGC is held high for the duration
of the programming time, P9.
After PGC is brought low, the programming sequence
is terminated. PGC must be held low for the time
specified by parameter P10 to allow high-voltage
discharge of the memory array.
FIGURE 3-4:
© 2009 Microchip Technology Inc.
PGC
PGD
Code Memory Programming
1
4-Bit Command
1
2
1
3
1
TABLE WRITE AND START PROGRAMMING INSTRUCTION TIMING (1111)
4
1
P5
1
n
2
n
16-Bit Data Payload
3
n
4
n
5
n
6
n
PGD = Input
15 16
n
n
P5A
The code sequence to program a PIC18F872X family
device is shown in Table 3-5. The flowchart, shown in
Figure 3-6, depicts the logic necessary to completely
write a PIC18F872X family device. The timing diagram
that details the Start Programming command and
parameters, P9 and P10, is shown in Figure 3-4.
TABLE 3-4:
PIC18F872X FAMILY
(Arranged by
4-Bit Command
PIC18FX527
PIC18FX622
PIC18FX627
PIC18FX628
PIC18FX722
PIC18FX723
1
Note:
0
Family)
Device
2
0
3
0
The TBLPTR register must point to the
same region when initiating the program-
ming sequence as it did when the write
buffers were loaded.
0
Programming Time
WRITE AND ERASE
BUFFER SIZES
Write Buffer Size
in Bytes
P9
64
4
DS39643C-page 15
P10
Size in Bytes
Erase Buffer
Data Payload
1
0
16-Bit
64
2
0
3
0