PIC18F13K22-I/ML Microchip Technology, PIC18F13K22-I/ML Datasheet - Page 62

• Manufacturer Part Number: PIC18F13K22-I/ML
• Description: IC MCU 8BIT 8KB FLASH 20-QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F13K22-I/ML

• Program Memory Type: FLASH
• Program Memory Size: 8KB (4K x 16)
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, MSSP, SPI, USART
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 4
• Operating Supply Voltage: 1.8 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PIC18F1XK22/LF1XK22
5.6
Data EEPROM memory has its own code-protect bits
in Configuration Words. External read and write
operations are disabled if code protection is enabled.
The microcontroller itself can both read and write to the
internal data EEPROM, regardless of the state of the
code-protect Configuration bit. Refer to Section 22.0
“Special Features of the CPU” for additional
information.
5.7
There are conditions when the user may not want to
write to the data EEPROM memory. To protect against
spurious EEPROM writes, various mechanisms have
been implemented. On power-up, the WREN bit is
cleared. In addition, writes to the EEPROM are blocked
during
parameter 33).
EXAMPLE 5-3:
TABLE 5-1:
DS41365D-page 62
EEADR
EECON1
EECON2
EEDATA
INTCON
IPR2
PIE2
PIR2
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used during Flash/EEPROM access.
Loop
Name
Operation During Code-Protect
Protection Against Spurious Write
the
CLRF
BCF
BCF
BCF
BSF
BSF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
BTFSC
BRA
INCFSZ
BRA
BCF
BSF
EEPROM Control Register 2 (not a physical register)
EEPROM Data Register
GIE/GIEH
EEADR7
Power-up
OSCFIP
OSCFIE
OSCFIF
EEPGD
Bit 7
REGISTERS ASSOCIATED WITH DATA EEPROM MEMORY
EEADR
EECON1, CFGS
EECON1, EEPGD
INTCON, GIE
EECON1, WREN
EECON1, RD
55h
EECON2
0AAh
EECON2
EECON1, WR
EECON1, WR
$-2
EEADR, F
LOOP
EECON1, WREN
INTCON, GIE
DATA EEPROM REFRESH ROUTINE
PEIE/GIEL
Timer
EEADR6
CFGS
Bit 6
C1IP
C1IE
C1IF
period
EEADR5 EEADR4 EEADR3 EEADR2 EEADR1 EEADR0
TMR0IE
Bit 5
C2IP
C2IE
C2IF
—
(T
; Start at address 0
; Set for memory
; Set for Data EEPROM
; Disable interrupts
; Enable writes
; Loop to refresh array
; Read current address
;
; Write 55h
;
; Write 0AAh
; Set WR bit to begin write
; Wait for write to complete
; Increment address
; Not zero, do it again
; Disable writes
; Enable interrupts
PWRT
Preliminary
INT0IE
FREE
,
EEIP
EEIE
EEIF
Bit 4
WRERR
The write initiate sequence and the WREN bit together
help prevent an accidental write during brown-out,
power glitch or software malfunction.
5.8
The data EEPROM is a high-endurance, byte
addressable array that has been optimized for the
storage of frequently changing information (e.g.,
program variables or other data that are updated often).
When variables in one section change frequently, while
variables in another section do not change, it is possible
to exceed the total number of write cycles to the
EEPROM without exceeding the total number of write
cycles to a single byte. If this is the case, then an array
refresh must be performed. For this reason, variables
that change infrequently (such as constants, IDs,
calibration, etc.) should be stored in Flash program
memory.
RABIE
BCLIP
BCLIE
BCLIF
Bit 3
Using the Data EEPROM
TMR0IF
WREN
Bit 2
—
—
—
TMR3IP
TMR3IE
TMR3IF
INT0IF
 2010 Microchip Technology Inc.
Bit 1
WR
RABIF
Bit 0
RD
—
—
—
on page
Values
Reset
259
259
259
259
257
260
260
260