AK2574 Datasheet, PDF (25/30 Pages) Asahi Kasei Microsystems – 156M Laser Diode Driver + APC for Burst Mode

ASAHI KASEI
[AK2574]
Table 5-3 EEPROM Address MAP
Device
Address
Address
DATA (D7-D0)
A0h 00h (0) ～
7Fh (127)
User Area
(1kbit)
A0h 80h (128) ～ No Memory
FFh (255)
A2h 00h (0) ～
FFh (255)
A4h 00 h(0) ～
7F h(127)
E_DAC1_TC
Temperature data for I-DAC1 (1kbit)
A4h 80h (128) ～ E_DAC2_TC
FFh (255) ^{Temperature data for I-DAC2 (1kbit)}
A6h 00h (0) ～
1Fh(31)
E_DUTY_TC (256bit)
Temperature data for Duty Adjustment
A6h 20h (32) ～ Reserved
5Fh (95)
A6h 60h (96) ～
7Fh (255)
Adjustment data
(256bit)
Initial
Value
00h
Remark
00h Addressing with R_TEMP
(1.5℃ step)
00h Addressing with R_TEMP
(1.5℃ step)
00h Addressing with MSB 5bit of
R_TEMP (6℃ step)
00h
see Table 5-4 and 5-5
Table 5-4 Adjustment Data Area (Device Address = A6h)
EEPROM 名
Address
Function
E_VREFTRIM[7:4] 60h
E_TEMP_OFFSET 60h
[3:0]
E_TXDIS_POL[2] 61h
Oscillator Frequency
Temperature sensor offset
TXDIS Polarity
E_TXACT_POL[1] 61h
TXACT Polarity
E_CLKALM_POL[0] 61h
CLKALM Polarity
E_DAC_TXACT
62h
TXACT Reference Voltage
E_AKM_SET[1:0] 6Dh AKM初期設定値
Bit Initial
Value
4 Factory
4 Setting
Remark
10
10
10
3 000
2 00
0: Shutdown at “H”
1: Shutdown at “L”
0: “H” at TXACT detection
1: “L” at TXACT detection
0: “H” at CLKALM detection
1: “L” at CLKALM detection
see Table 3-2
Table 5-5 EEPROM Map (Adjustment Data Area)
Address D7
D6
D5
D4
D3
60h
VREFTRIM
61h
62h
63h-6Ch
6Dh
6Eh-FFh
Reserved
D2
D1
D0
TEMP_OFFSET
TXDIS_ TXACT_ CLKALM_
POL
POL
POL
DAC_TXACT
AKM_SET
<MS0266-E-00>
-25-
2003/12