Rev. 1.10
52
October 23, 2020
Rev. 1.10
53
October 23, 2020
BC66F5652
2.4GHz RF Transceiver A/D Flash MCU
BC66F5652
2.4GHz RF Transceiver A/D Flash MCU
EEPROM Data Memory
This device contains an area of internal EEPROM Data Memory. EEPROM is by its nature a non-
volatile form of re-programmable memory, with data retention even when its power supply is
removed. By incorporating this kind of data memory, a whole new host of application possibilities
are made available to the designer. The availability of EEPROM storage allows information such
as product identification numbers, calibration values, specific user data, system setup data or other
product information to be stored directly within the product microcontroller. The process of reading
and writing data to the EEPROM memory has been reduced to a very trivial affair.
EEPROM Data Memory Structure
The EEPROM Data Memory capacity is 128×8 bits for the device. Unlike the Program Memory and
RAM Data Memory, the EEPROM Data Memory is not directly mapped into memory space and
is therefore not directly addressable in the same way as the other types of memory. Read and Write
operations to the EEPROM are carried out in single byte operations using an address and a data
register in Sector 0 and a single control register in Sector 1.
EEPROM Registers
Three registers control the overall operation of the internal EEPROM Data Memory. These are the
address register, EEA, the data register, EED and a single control register, EEC. As both the EEA
and EED registers are located in Sector 0, they can be directly accessed in the same way as any other
Special Function Register. The EEC register however, being located in Sector 1, can only be read
from or written to indirectly using the MP1L/MP1H or MP2L/MP2H Memory Pointer and Indirect
Addressing Register, IAR1/IAR2. Because the EEC control register is located at address 40H in
Sector 1, the MP1L or MP2L Memory Pointer must first be set to the value 40H and the MP1H or
MP2H Memory Pointer high byte set to the value, 01H, before any operations on the EEC register
are executed.
Register
Name
Bit
7
6
5
4
3
2
1
0
EEA
—
EEA6
EEA5
EEA4
EEA3
EEA2
EEA1
EEA0
EED
D7
D6
D5
D4
D3
D2
D1
D0
EEC
EWERTS
EREN
ER
MODE
WREN
WR
RDEN
RD
EEPROM Register List
• EEA Register
Bit
7
6
5
4
3
2
1
0
Name
—
EEA6
EEA5
EEA4
EEA3
EEA2
EEA1
EEA0
R/W
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
—
0
0
0
0
0
0
0
Bit 7
Unimplemented, read as “0”
Bit 6~0
EEA6~EEA0
: Data EEPROM address bit 6 ~ bit 0
• EED Register
Bit
7
6
5
4
3
2
1
0
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit 7~0
D7~D0
: Data EEPROM data bit 7 ~ bit 0
