em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 29

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
Bit 5 (EEWE): EEPROM Write Enable bit
Bit 4 (EEDF): EEPROM Detect Flag
Bit 3 (EEPC): EEPROM power-down control bit
Bits 2 ~ 0:
6.1.13 Bank 0 RC (256 Bytes EEPROM Address)
Bits 7 ~ 0:
6.1.14 Bank 0 RD (256 Bytes EEPROM Data)
Bits 7 ~ 0:
EE_D7
EE_A7
Bit 7
Bit 7
EM78F548/544/542/541N series ICs do NOT support EEPROM function. Therefore,
the corresponding control registers (Bank0 RB~RD) are reserved.
EM78F548/544/542/541N series ICs do NOT support EEPROM function. Therefore,
the corresponding control registers (Bank0 RB~RD) are reserved.
EM78F548/544/542/541N series ICs do NOT support EEPROM function.
Therefore, the corresponding control registers (Bank0 RB~RD) are reserved.
For F642/542N, Bit 7 is unused. Set to “0” all the time
For F641/541N, Bit 7 is unused. Set to “0” all the time.
EE_D6
EE_A6
Bit 6
Bit 6
0: Prohibit write to the EEPROM
1: Allows EEPROM write cycles
0: Write cycle is completed
1: Write cycle is unfinished
0: Switch OFF the EEPROM
1: Switch ON the EEPROM
Not used, set to “0” all the time.
256 bytes EEPROM address
256 bytes EEPROM data
EE_A5
EE_D5
Bit 5
Bit 5
EM78F648/644/642/641/548/544/542/541N
EE_A4
EE_D4
Bit 4
Bit 4
NOTE
NOTE
NOTE
EE_D3
EE_A3
Bit 3
Bit 3
EE_D2
EE_A2
Bit 2
Bit 2
8-Bit Microcontroller
EE_A1
EE_D1
Bit 1
Bit 1
EE_A0
EE_D0
Bit 0
Bit 0
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