PIC18F8680-E/PT Microchip Technology, PIC18F8680-E/PT Datasheet - Page 25

• Manufacturer Part Number: PIC18F8680-E/PT
• Description: IC PIC MCU FLASH 32KX16 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8680-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: CAN, EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.25K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-TFQFP
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3328 B
• Interface Type: I2C, SPI, AUSART, CAN
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 69
• Number Of Timers: 8
• Operating Supply Voltage: 4.2 V to 5.5 V
• Maximum Operating Temperature: + 125 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, DM183032
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 4-4:
4.5
A data EEPROM address may be read via a sequence of
core instructions (4-bit command, ‘0000’) and then out-
put on PGD via the 4-bit command, ‘0010’ (Shift Out
Data Holding register). The result may then be immedi-
ately compared to the appropriate data in the program-
mer’s memory for verification. Refer to Section 4.4
“Read Data EEPROM Memory” for implementation
details of reading data EEPROM.
4.6
The term “Blank Check” means to verify that the device
has no programmed memory cells. All memories must
be verified: code memory, data EEPROM, ID locations
and Configuration bits. The Device ID registers
(3FFFFEh:3FFFFFh) should be ignored.
A “blank” or “erased” memory cell will read as a ‘1’. So,
“Blank Checking” a device merely means to verify that
all bytes read as FFh, except the Configuration bits.
Unused (reserved) Configuration bits will read ‘0’ (pro-
grammed). Refer to Table 5-2 for blank configuration
expect data for the various PIC18FXX80/XX85
devices.
 2010 Microchip Technology Inc.
PGC
PGD
Verify Data EEPROM
Blank Check
1
0
2
1
3
0
SHIFT OUT DATA HOLDING REGISTER TIMING (‘0010’)
4
0
P5
PGD = Input
1
2
3
4
5
6
7
8
P6
9
Given that “Blank Checking” is merely code and data
EEPROM verification with FFh expect data, refer to
Section 4.2 “Verify Code Memory and ID Locations”
and Section 4.4 “Read Data EEPROM Memory” for
implementation details.
FIGURE 4-5:
LSb
P14
10 11
1
PIC18FXX80/XX85
2
PGD = Output
Shift Data Out
Blank Check Device
12
3
13
4
Device
Blank?
Abort
Start
14
Is
5
No
15 16
BLANK CHECK FLOW
6
MSb
P5A
Yes
1
n
4-Bit Command
Fetch Next
PGD = Input
2
DS39606E-page 25
n
Continue
3
n
4
n