EM78M611E

Universal Serial Bus Series Microcontroller

ERC (AD MSB Data Register) Default Value: (0B_0000_0000)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

 

 

 

 

 

 

 

 

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

2 bits AD MSB Digital Data.

ERD (AD Control Register) Default Value: (0B_0000_0000)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

 

 

 

 

 

 

 

 

0

0

0

0

0

-

ADPS1

ADPS0

 

 

 

 

 

 

 

 

ERD [0 1]: The clock source of AD converting time.

00:256kHz

01:128kHz

10:64kHz

11:32kHz

8.12EEPROM

Four bytes of EEPROM are located in the R2C~R2F of Bank 3. The stored data of EEPROM are not erased when the power is off and can be read and re-written by firmware. In some special case of application, for example, cordless keyboard controller, it can store important data, such as the cordless keyboard’s device identical number.

A control register, ERA controls the EEPROM, that is, to read, write, or to erase the data from EEPROM. Writing a command into this register will execute an action to the EEPROM. The command value is defined in the following tale. Note that there is an execution time laps for each command. Before writing the next command into the control register, allow enough time for the EEPROM to finish the previous command.

Command Value

Action

Execution Time

 

 

 

0B_0000_0000

Read

1 ms

 

 

 

0B_0000_0001

Write

9 ms

 

 

 

0B_0000_0010

Erase

128 ms

 

 

 

0B_0000_0011

Disable

N.A.

 

 

 

Product Specification (V1.11) 04.20.2007

31

(This specification is subject to change without further notice)

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IBM EM78M611E manual ERC AD MSB Data Register Default Value 0B00000000, ERD AD Control Register Default Value 0B00000000