em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 98

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

EM78F648/644/642/641/548/544/542/541N
8-Bit Microcontroller
88 •
Bit 4 (EEDF): EEPROM Detect flag
Bit 3 (EEPC): EEPROM power down control bit
Bits 2~0:
6.3.83 Bank1 R20: EEPROM ADDR
Bits 7~0 (EERA7~EERA0): EEPROM address register
6.3.84 Bank1 R21: EEPROM DATA
Bits 7~0 (EERD7~EERD0): EEPROM data register. Read only.
6.3.85 Bank1 R22 (Not Used)
6.3.86 Bank1 R23: I2CCR1 (I2C Status and Control Register1)
Bit 7 (Strobe/Pend): In Master mode, it is used as strobe signal to control I2C circuit
Strobe/Pend
EERA7
EERD7
Bit 7
Bit 7
Bit 7
EM78F548N currently does not support EEPROM function. Therefore, the
corresponding control registers (Bank1 R1F~R21) are reserved.
EM78F548N currently does not support EEPROM function. Therefore, the
corresponding control registers (Bank1 R1F~R21) are reserved.
EM78F548N currently does not support EEPROM function. Therefore, the
corresponding control registers (Bank1 R1F~R21) are reserved.
EERD6
EERA6
Bit 6
Bit 6
Bit 6
IMS
in sending SCL clock. Automatically resets after receiving or
transmitting handshake signal (ACK or NACK). In Slave mode, it is
used as pending signal. You should clear it after filling data into Tx
buffer or taking data from Rx buffer to inform the Slave I2C circuit to
release SCL signal.
0: Write cycle is completed
1: Write cycle is uncompleted
0: Switch OFF EEPROM
1: EEPROM is operating
Not used, fixed to “0” all the time.
EERD5
EERA5
Bit 5
ISS
Bit 5
Bit 5
STOP SAR_EMPTY
Bit 4
EERD4
EERA4
Bit 4
Bit 4
(This specification is subject to change without further notice)
NOTE
NOTE
NOTE
Bit 3
EERD3
EERA3
Bit 3
Bit 3
Product Specification (V1.0) 05.05.2010
Bit 2
ACK
EERD2
EERA2
Bit 2
Bit 2
FULL
EERD1
Bit 1
EERA1
Bit 1
Bit 1
EMPTY
EERA0
EERD0
Bit 0
Bit 0
Bit 0