AK2572 Datasheet, PDF (39/50 Pages) Asahi Kasei Microsystems – APC for Burst Mode Applicable Direct Modulation Laser Diode

ASAHI KASEI
[AK2572]
Table 9-4 EEPROM : Adjustment Data Configuration
EEPROM
Address
Function
Bit Initial
Note
E_VREFTRIM [7:4] 60h
On-chip oscillator frequency
4
Factory
setting
E_TEMP
_OFFSET [3:0]
60h
Temperature sensor offset
4
Factory
setting
E_PWR_SEL [7:6]
61h
EEPROM data switching at
Power Leveling [2]
20
Refer to Table 5-2
E_BURST_ALM [5:4] 61h
EXTALM mask setting at
Burst mode
2
0:Non-masked, 1:Masked
0
[5]: EXTALM2,
[4]: EXTALM1
E_BURST_SET [3] 61h
Burst mode setting
10
0:OFF, 1:ON
E_PWR_LVL2
_SET [2]
61h
Power Leveling [2] setting
10
0:OFF, 1:ON
E_SFP_SET [1]
61h
SFP_MSA support setting 1 0
0:ON, 1:OFF
E_PWR_LVL1_SET [0] 61h
Power Leveling [1] setting
10
Refer to Table 5-1
E_APC_FF_SET [7:6] 62h
APC FF setting
20
Refer to Table 4-6
E_APC_FB_SET [5:4] 62h
APC FB setting
20
Refer to Table 4-6
E_APC_INIT_SET [3] 62h APC_FB initial value setting 1 0
0: OFF, 1: ON
E_DAC3_GAIN [2] 62h
V-DAC3 gain setting
1 0 0:Gain＝1, 1:Gain＝1.2/2.2
E_DAC2_GAIN [1] 62h
I-DAC2 gain setting
1 0 0:Gain＝1/2, 1: Gain＝1
E_DAC1_GAIN [0] 62h
I-DAC1 gain setting
1 0 0:Gain＝1/10, 1: Gain＝1
E_TIMER
_OPTALM [6]
63h
OPTALM mask time setting
for SFP_TXFAULT detection
1
0
0:160ms, 1:2ms [Typ.]
(Refer to Table 8-1)
E_EXTALM2_POL [5] 63h
EXTALM2 polarity setting 1 0 0:“H” active, 1:“L” active
E_EXTALM1_POL [4] 63h
EXTALM1 polarity setting 1 0 0:“H” active, 1:“L” active
E_TEMP_DET [3]
63h
Temperature difference detection
at Shutdown release
1
0
0:OFF, 1:ON
Refer to Section 7.2
E_DAC_SET [2:0]
63h
DAC operation setting
0:OFF, 1:ON
3 0 [2]: V-DAC3, [1]: I-DAC2
[0]: I-DAC1
E_OPTALM [7:6]
64h
OPTALM threshold
2 0 0 : 1/3, 1: 1/4, 2 : 1/6, 3 : 1/7
E_PDGAIN [5:0]
64h
PD gain setting
6 00h
Refer to Table 4-3
E_EXTALM2_SET [5] 65h EXTALM2 setting for TXFAULT 1 0
0:OFF, 1:ON (Target)
E_EXTALM1_SET [4] 65h EXTALM1 setting for TXFAULT 1 0
0:OFF, 1: ON (Target)
E_CURRALM_SET [3] 65h CURRALM setting for TXFAULT 1 0
0:OFF, 1: ON (Target)
E_OPTALM_SET [2] 65h OPTALM setting for TXFAULT 1 0
0:OFF, 1: ON (Target)
E_TIMER
_EXTALM2 [1]
65h
EXTALM2 mask time setting
for SFP_TXFAULT detection
1
0
0:0ms , 1:2ms [Typ.]
（Refer to Table 8-2）
E_TIMER
_EXTALM1 [0]
65h
EXTALM1 mask time setting
for SFP_TXFAULT detection
1
0
0:0ms , 1:2ms [Typ.]
（Refer to Table 8-2）
E_TEMPALM_SET [7] 66h TEMPALM setting for TXFAULT 1 0
0:OFF, 1: ON (Target)
E_TEMP_WIN [7:0]
67h
Window setting for Temperature
difference detection
8
00h
Refer to Section 7.2 and
Table 4-10
E_MODV_SEL [7]
68h
DAC setting for Imod
(Data setting for I-DAC1,V-DAC3)
1
0
Refer toTable 3-4
E_MOD_FBRT [6:0] 68h APC_FB dividing value for Imod 7 00h Refer to Section 4.2.4
E_BIAS_FBRT [6:0] 69h APC_FB dividing value for Ibias 7 00h Refer to Section 4.2.4
E_TEMPALM [7:0] 6Ah
TEMPALM threshold
8 00h
Refer toTable 4-10
-39-
< MS0290-E-01>
2004/8