PIC16F648A-I/P Microchip Technology Inc., PIC16F648A-I/P Datasheet - Page 54
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PIC16F648A-I/P
Manufacturer Part Number
PIC16F648A-I/P
Description
18 PIN, 7 KB FLASH, 256 RAM, 16 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F648A-IP.pdf
(132 pages)
Specifications of PIC16F648A-I/P
Comparators
2
Cpu Speed
5 MIPS
Eeprom Memory
256 Bytes
Input Output
16
Interface
USART
Memory Type
Flash
Number Of Bits
8
Package Type
18-pin PDIP
Programmable Memory
7K Bytes
Ram Size
256 Bytes
Speed
20 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F648A-I/P
Manufacturer:
MICROCHIP
Quantity:
2 100
Part Number:
PIC16F648A-I/P
Manufacturer:
MICROCH
Quantity:
20 000
PIC16F630/676
8.7
Data memory can be code protected by programming
the CPD bit to ‘0’.
When the data memory is code protected, the CPU is
able to read and write data to the Data EEPROM. It is
recommended to code protect the program memory
when code protecting data memory. This prevents
anyone from programming zeroes over the existing
code (which will execute as NOPs) to reach an added
routine, programmed in unused program memory,
which
Programming unused locations to ‘0’ will also help
prevent data memory code protection from becoming
breached.
TABLE 8-1:
DS40039C-page 52
0Ch
9Ah
9Bh
9Ch
9Dh
Legend: x = unknown, u = unchanged, - = unimplemented read as '0', q = value depends upon condition.
Note 1: EECON2 is not a physical register.
Address
outputs
DATA EEPROM OPERATION
DURING CODE PROTECT
Shaded cells are not used by Data EEPROM module.
PIR1
EEDATA
EEADR
EECON1
EECON2
Name
the
REGISTERS/BITS ASSOCIATED WITH DATA EEPROM
(1)
contents
EEPROM Data Register
EEPROM Control Register 2
EEIF
Bit 7
—
—
EEPROM Address Register
ADIF
of
Bit 6
—
data
Bit 5
—
—
memory.
Bit 4
—
—
WRERR WREN
CMIF
Bit 3
Bit 2
—
Bit 1
WR
—
TMR1IF 00-- 0--0 00-- 0--0
Bit 0
2003 Microchip Technology Inc.
RD
0000 0000 0000 0000
-000 0000 -000 0000
---- x000 ---- q000
---- ---- ---- ----
POR, BOD
Value on
Value on all
RESETS
other