PIC18F26K80-I/MM Microchip Technology, PIC18F26K80-I/MM Datasheet - Page 145
![ECAN, 64KB Flash, 4KB RAM, 16 MIPS, 12-bit ADC, CTMU 28 QFN-S 6x6mm TUBE](/photos/16/12/161267/qfn-28_sml.jpg)
PIC18F26K80-I/MM
Manufacturer Part Number
PIC18F26K80-I/MM
Description
ECAN, 64KB Flash, 4KB RAM, 16 MIPS, 12-bit ADC, CTMU 28 QFN-S 6x6mm TUBE
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18F25K80-ISO.pdf
(628 pages)
Specifications of PIC18F26K80-I/MM
Core Processor
PIC
Core Size
8-Bit
Speed
64MHz
Connectivity
ECAN, I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
24
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.6K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad
Processor Series
PIC18F26K80
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3648 B
Interface Type
I2C, SPI
Maximum Clock Frequency
64 MHz
Number Of Programmable I/os
24
Number Of Timers
5
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8.0
The data EEPROM is a nonvolatile memory array,
separate from the data RAM and program memory, that
is used for long-term storage of program data. It is not
directly mapped in either the register file or program
memory space, but is indirectly addressed through the
Special Function Registers (SFRs). The EEPROM is
readable and writable during normal operation over the
entire V
Five SFRs are used to read and write to the data
EEPROM, as well as the program memory. They are:
• EECON1
• EECON2
• EEDATA
• EEADR
• EEADRH
The data EEPROM allows byte read and write. When
interfacing to the data memory block, EEDATA holds
the 8-bit data for read/write and the EEADRH:EEADR
register pair holds the address of the EEPROM location
being accessed.
The EEPROM data memory is rated for high erase/write
cycle endurance. A byte write automatically erases the
location and writes the new data (erase-before-write).
The write time is controlled by an on-chip timer; it will
vary with voltage and temperature, as well as from chip-
to-chip. Please refer to Parameter
Section 31.0 “Electrical Characteristics”
limits.
8.1
The EEADRH:EEADR register pair is used to address
the data EEPROM for read and write operations.
EEADRH holds the two MSbs of the address; the upper
6 bits are ignored. The 10-bit range of the pair can
address a memory range of 1024 bytes (00h to 3FFh).
2011 Microchip Technology Inc.
DD
DATA EEPROM MEMORY
EEADR and EEADRH Registers
range.
D122 (Table 31-1
) for exact
Preliminary
in
PIC18F66K80 FAMILY
8.2
Access to the data EEPROM is controlled by two
registers: EECON1 and EECON2. These are the same
registers which control access to the program memory
and are used in a similar manner for the data
EEPROM.
The EECON1 register
register for data and program memory access. Control
bit, EEPGD, determines if the access will be to program
memory or data EEPROM memory. When clear,
operations will access the data EEPROM memory.
When set, program memory is accessed.
Control bit, CFGS, determines if the access will be to
the Configuration registers or to program memory/data
EEPROM memory. When set, subsequent operations
access Configuration registers. When CFGS is clear,
the EEPGD bit selects either program Flash or data
EEPROM memory.
The WREN bit, when set, will allow a write operation.
On power-up, the WREN bit is clear. The WRERR bit is
set in hardware when the WREN bit is set and cleared,
when the internal programming timer expires and the
write operation is complete.
The WR control bit initiates write operations. The bit
cannot be cleared, only set, in software; it is cleared in
hardware at the completion of the write operation.
Control bits, RD and WR, start read and erase/write
operations, respectively. These bits are set by firmware
and cleared by hardware at the completion of the
operation.
The RD bit cannot be set when accessing program
memory (EEPGD = 1 ). Program memory is read using
table read instructions. See
and Table Writes”
The EECON2 register is not a physical register. It is
used exclusively in the memory write and erase
sequences. Reading EECON2 will read all ‘ 0 ’s.
Note:
Note:
EECON1 and EECON2 Registers
During normal operation, the WRERR is
read as ‘ 1 ’. This can indicate that a write
operation was prematurely terminated by
a Reset, or a write operation was
attempted improperly.
The EEIF interrupt flag bit (PIR4<6>) is
set when the write is complete. It must be
cleared in software.
regarding table reads.
(Register
Section 7.1 “Table Reads
8-1) is the control
DS39977C-page 145
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