R01US0068EJ0100 Datasheet, PDF (16/56 Pages) Renesas Technology Corp – EEPROM Emulation Library

RL78 Family
EEPROM Emulation Library Pack02
Chapter 2 EEPROM Emulation
2. 3. 6 EEL Block Overview
Figure 2-7 shows an example of an EEL block that contains multiple units of stored data:
•Data ID 0x01 with size = 0x04,
•Data ID 0x02 with size = 0x01
•Data ID 0x03 is defined but not written here,
•Data ID 0x04 with size = 0x02
The data have been written in the sequence ID 0x01 -> ID 0x04 -> ID 0x02. In this example, the data with ID
0x03 has not been written yet.
Figure 2-7 Example of an Active EEL Block
relative byte
index within
block
0x0000
0x0001
0x0002
0x0003
0x0004
0x0005
0x0006
0x0007
0x0008
0x0009
0x000A
0x000B
0x000C
0x000D
0x000E
0x000F
…
…
…
…
…
…
…
…
…
0x03F8
0x03F9
0x03FA
0x03FB
0x03FC
0x03FD
0x03FE
0x03FF
A = 0x02
B = 0xFD
I = 0xFF
X = 0xFF
reserved
reserved
reserved
reserved
SoR à ID = 0x01
EoR à ~ID = 0xFE
SoR à ID = 0x04
EoR à ~ID = 0xFB
SoR à ID = 0x02
EoR à ~ID = 0xFD
separator (erased 2 bytes)
erased area
(all bytes 0xFF)
DATA(ID=0x02)[0]
DATA(ID=0x04)[0]
DATA(ID=0x04)[1]
DATA(ID=0x01)[0]
DATA(ID=0x01)[1]
DATA(ID=0x01)[2]
DATA(ID=0x01)[3]
block header
reference
area
data area
R01US0068EJ0100 Rev.1.00
Mar. 28, 2014
Page 16 of 53