AK2570 Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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производитель

AK2570

Feed Forward APC LSI for LD Module

Asahi Kasei Microdevices 

ASAHI KASEI

[AK2570]

Register map

Data

Name Address

D23 ~ D8 D7 D6 D5 D4 D3 D2 D1 D0

Function

RTMP 000 X ~ X D7 D6 D5 D4 D3 D2 D1 D0 Holding the data (temperature) generated by AD2

RDA1 001 X ~ X D7 D6 D5 D4 D3 D2 D1 D0

Holding the data for DA1

RDA2 010 X ~ X D7 D6 D5 D4 D3 D2 D1 D0

Holding the data for DA2

RDA3 011 X ~ X D7 D6 D5 D4 D3 D2 D1 D0

Holding the data for DA3

RINT 100 X ~ X X X X D4 D3 D2 D1 D0 Holding the trimming data for T-SENSE [*1]

RVPD 101 X ~ X D7 D6 D5 D4 D3 D2 D1 D0 Holding the data (VPDIN) generated by AD1

RATRM 110 X ~ X X X X D4 D3 D2 D1 D0 Holding the trimming data for ALMOUT [*2]

[*1］ RINT register stores the initial data for the offset voltage of the T-SENSE

[*2] ATRM register stores the adjustment data for the alarm timing at the 50Mbps and the 156Mbps burst trans-

mission (AKM recommends to use the EEPROM data for RATRM register already written at the shipment.）

Initial register data

Name Address D23 ~

RTMP

000

X~

RDA1

001

X~

RDA2

010

X~

RDA3

011

X~

RINT

100

X~

D8 D7 D6 D5 D4 D3 D2 D1 D0

X1 1 1 1 1 1 1 1

X0 0 0 0 0 0 0 0

X0 0 0 0 0 0 0 0

X0 0 0 0 0 0 0 0

XXX X 0 0 0 0 0

RVPD

101

X ~ X0 0 0 0 0 0 0 0

RATRM

110

X ~ XXX X 1 0 0 0 0

<Note> ‘X’ is indefinite, ‘1’ or ‘0’.

IV) EEPROM Access

[1] Command for enabling to write the data in the EEPROM (EWEN)

‘EWEN’ command makes it possible to write the data in the EEPROM. It is necessary to execute this

command before writing the data in the EEPROM, because it is automatically set at ‘Power ON’ to prohibit

writing the data in the EEPROM. In “Training mode”, it is always possible to write the data in the EEPROM

after executing this command except the case of ‘Power OFF’ or executing ‘EWDS’ command.

[2] Command for prohibiting to write the data in the EEPROM (EWDS)

‘EWDS’ command makes it impossible to write the data in the EEPROM and it is the same setting at

‘Power ON’. This command is available to change the setting to prohibit writing the data in the EEPROM

without ‘Power OFF’.

[3] Command for writing the data in the EEPROM (WRITE-EEP)

It is able to write the data in the nominated EEPROM by executing ‘WRITE-EEP’ command. And it is

necessary to execute ‘EWEN’ command at first for permitting to write the data in the EEPROM.

[4] Command for reading the data in the EEPROM (READ-EEP)

It is able to read the data held in the nominated EEPROM by executing ‘READ-EEP’ command.

<MS0115-E-00>

9

2001/10

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