PIC12F519 Microchip Technology, PIC12F519 Datasheet - Page 23

• Manufacturer Part Number: PIC12F519
• Description: 8-Bit Flash Microcontroller
• Manufacturer: Microchip Technology

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5.0
The
0x400-0x43F. It is physically attached to the Flash pro-
gram memory block. The Flash memory consists of 8
rows and has self-write capability of up to 64 bytes.
This memory block is not directly mapped in the regis-
ter file space. Instead, it is indirectly addressed through
the Special Function Registers. There are three SFRs
used to read and write this memory:
• EEDATA (Register 5-1)
• EEADR (Register 5-2)
• EECON (Register 5-3)
EEDATA holds the 8-bit data for read/write, and
EEADR holds the address of the EEDATA location
being accessed. The effective program counter
address is EEADR + 400h.
• EEADR (00h), PC (400h)
• EEADR (01h), PC (401h)
REGISTER 5-1:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
EEDATA7
R/W-x
Flash
FLASH DATA MEMORY
data memory
EEDATA<7:0>: 8-bits of data to be read from/written to data Flash
EEDATA6
R/W-x
EEDATA: FLASH DATA REGISTER
W = Writable bit
‘1’ = Bit is set
resides at locations
EEDATA5
R/W-x
EEDATA4
R/W-x
Preliminary
x = Bit is unknown
‘0’ = Bit is cleared
EEDATA3
R/W-x
Only the lower 8 bits of each word is readable or
writable in User mode.
The Flash data memory allows byte read and write. A
byte write automatically erases the row in which the
target byte is located and writes the new data (erase
before write). During the operation of read/write, the
CPU stalls.
The write time is controlled by an on-chip timer. The
write/erase voltages are generated by an on-chip
charge pump rated to operate over the voltage range of
the device.
When the device is code-protected, the CPU may
continue to read and write the Flash data memory and
read the program memory. When code-protected, the
device programmer can no longer access data or
program memory.
EEDATA2
R/W-x
PIC12F519
EEDATA1
R/W-x
DS41319A-page 21
EEDATA0
R/W-x
bit 0