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AK2573A Datasheet, PDF (33/38 Pages) Asahi Kasei Microsystems – 125M / 156M Laser Diode Driver + APC
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ASAHI KASEI
[AK2573A]
8.4 Register
Register memory map is shown in Table 8-6 and 8-7. Register access is limited with WP pin and Operation mode
(refer to Fig 9-1, for more information).
Table 8-6 Register (Device Address = A8h)
Register
Address Function
Bit
R_VRFTRIM[7:4]
00h Oscillator Frequency
4
R_TEMP_OFFSET[3:0] 00h Temperature sensor offset 4
R_APC_FF_SET[7:6]
01h APC FF Setting
2
R_APC_FB_SET[5:4]
01h APC FB Setting
2
R_APC_INIT_SET[3]
01h APC FB Initial Setting
1
R_SFP[2]
01h MSA(SFP) Setting
1
R_DAC1_GAIN[1]
01h I-DAC1 Gain
1
R_DAC2_GAIN[0]
01h I-DAC2 Gain
1
R_TEMP_DET[5]
R_TIMER_OPTALM[4]
R_ALM_POL[3]
02h Temperature compensation 1
at shutdown release ON/OFF
02h Delay time of TXFAULT 1
detection with OPTALM
02h ALM Polarity
1
R_OPTALM[1:0]
02h OPTALM Reference Level 2
R_TEMP_WIN[6:0]
03h Temperature Difference
7
Detection Level
R_DAC1_FBRT[6:0]
05h APC FB Ratio for I-DAC1 7
R_DATAALM_MASK[0] 06h DATAALM Mask
1
R_DAC2_FBRT[6:0]
07h APC FB Ratio for I-DAC2 7
R_PDGAIN[5:0]
08h PDGAIN
6
R_TEMPALM[6:0]
09h TEMPALM Level
7
R_TEMP[6:0]
0Ah Detected Temperature
7
R_TEMP_STDW[6:0]
0Bh Temperature at Shutdown 7
request
R_DAC1_FF[7:0]
0Ch I-DAC1 FF
8
R_DAC2_FF[7:0]
0Dh I-DAC2 FF
8
R_APC_FB[8:0]
0Eh APC FB
9
R_DAC1_FB[8:0]
11h I-DAC1 FB
9
R_DAC2_FB[8:0]
12h I-DAC2 FB
9
R_DAC1[7:0]
13h I-DAC1
8
R_DAC2[7:0]
14h I-DAC2
8
R_APC_TRGT[4:0]
15h APC Reference
5
R_CURRALM_DAC1[7:4] 16h CURRALM for I-DAC1
4
R_CURRALM_DAC2[3:0] 16h CURRALM for I-DAC2
4
R_DUTY[4:0]
17h Duty Adjust
5
AKM Test
18h- Test for AKM
-
1Dh
Note 1: The data format of read / write via I2CTM (8bit) is shown in Fig 8-1.
Note 2: R_DAC1 = R_DAC1_FF + R_DAC1_FB, R_DAC1>=0,
Note 3: R_DAC2 = R_DAC2_FF + R_DAC2_FB, R_DAC2 >= 0
Type
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
S
S
S
U
U
U
U
U
U
-
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/(W)
R/(W)
R/W
R/W
R/(W)
R/(W)
R/(W)
R/(W)
R/(W)
R/W
R/W
R/W
R/W
-
Remark
see Table 4-4
see Table 4-4
0: No initial Setting
1: Initial Setting
0: No SFP Support
1: SFP Support
0: Gain = 1/2
1: Gain = 1
0: Gain = 1/2
1: Gain = 1
0: OFF
1: ON
0: 160ms
1: 2ms
0: “H”
1: “L”
00: 1/3, 01: 1/4
10: 1/6, 11: 1/7
see section 6.2
see section 4.3
0: DATAALM Valid
1: DATAALM Invalid
see section 4.3
see Table 4-2
see Table 4-9
see Table 4-9
see section 6.2
Note 2
Note 3
Note 1
Note 1
Note 1
Note 2
Note 3
see Table 4-3
see section 5.2
see section 5.2
<MS0189-E-01>
-33-
2004/5
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